CN217788627U

CN217788627U - Battery case and battery pack

Info

Publication number: CN217788627U
Application number: CN202221252532.0U
Authority: CN
Inventors: 李鑫
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-11-11
Anticipated expiration: 2032-05-23

Abstract

The utility model discloses a battery case and battery package, battery case includes: a first plate provided with a fluid channel; the second plate and the first plate form an accommodating space, and the second plate is welded with the first plate; a pipe joint disposed in the fluid passage, the pipe joint being welded to the second plate. Adopt welding mode to connect between first board and the second board, also connect through welding mode between second board and the pipe joint, not only can practice thrift battery case's volume, practice thrift battery case and account for the space, but also be favorable to promoting the inside sealed effect of battery package. The first plate with the temperature adjusting effect is used as the top plate and/or the bottom plate by eliminating the conventional tray bottom plate, so that the cost and the weight of the battery pack are reduced.

Description

Battery case and battery pack

Technical Field

The utility model relates to a battery technology field, more specifically relates to a battery case and battery package that has this battery case.

Background

The cold plate and the tray in the prior art are connected through bolts, bolts need to be punched on the cold plate, and the like, and the air tightness can be affected by the holes. In addition, the cold plate joint and the tray are not integrated together, which causes waste of space and materials and is not beneficial to internal sealing of the battery pack. In addition, the cold plate increases the overall weight of the battery pack, increasing overall cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery case's new technical scheme can solve at least one technical problem in the background art.

According to the utility model discloses a first aspect provides a battery shell, include: a first plate provided with a fluid channel; the second plate and the first plate form an accommodating space, and the second plate is welded with the first plate; a pipe joint disposed in the fluid passage, the pipe joint being welded to the second plate

Optionally, the second plate is disposed on one side of the first plate and connected to the first plate by friction stir welding.

Optionally, the second plate is provided with a through mounting hole, and at least a part of the pipe joint is located in the mounting hole and welded with the second plate.

Optionally, an end surface of one end of the pipe joint on the axis of the mounting hole and the outer side surface of the second plate are connected by arc welding.

Optionally, the mounting hole is a notch recessed inward along an edge of the second plate.

Optionally, a step portion is disposed in the notch at a position close to the second plate, and the step portion is connected to the outer side surface of the second plate and spaced apart from the inner side surface of the second plate.

Optionally, the outer edge of the first plate is provided with a protruding portion corresponding to the notch, and the protruding portion and the stepped portion are connected through friction stir welding.

Optionally, the first plate is disposed on at least one side of the receiving space in the axial direction.

Optionally, two ends of the fluid channel are a liquid inlet and a liquid outlet respectively, and the pipeline joint is arranged in at least one of the liquid inlet and the liquid outlet.

According to the utility model discloses a battery package of second aspect includes: a battery case, the battery case being any one of the battery cases described above; the battery cell module is arranged in the accommodating space of the battery shell.

According to the utility model discloses a battery case adopts welding mode to connect between first board and the second board, also connects through welding mode between second board and the pipe joint, not only can practice thrift battery case's volume, practices thrift battery case and accounts for the space, but also does benefit to the inside sealed effect of promotion battery package. In addition, the conventional tray bottom plate is eliminated, and the first plate with the temperature adjusting effect is adopted as the top plate and/or the bottom plate, so that the cost and the weight of the battery pack are reduced.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a structural schematic diagram of an angle of a battery case according to an embodiment of the present invention.

Fig. 2 is an enlarged view of the area a circled in fig. 1.

FIG. 3 is a schematic view of the installation of a first plate and pipe joint according to one embodiment of the present invention;

FIG. 4 is an enlarged view of area B circled in FIG. 3;

fig. 5 is a partial perspective view of a battery housing of an embodiment of the present invention;

fig. 6 is a schematic view of an angled mounting of a second plate of a battery housing and a pipe joint according to an embodiment of the invention;

fig. 7 is a schematic view of another angle of the second plate of the battery case and the pipe joint according to an embodiment of the present invention.

Reference numerals

A battery case 100;

a first plate 10; a protrusion 11;

a second plate 20; a mounting hole 21; a step portion 22;

a housing space 30;

a pipe joint 40; a first segment body 41; a second segment 42; a third segment body 43;

a first weld 50; and a second weld 60.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless specifically stated otherwise, the relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

The battery case 100 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 7, a battery case 100 according to an embodiment of the present invention includes a first plate 10, a second plate 20, and a pipe joint 40.

Specifically, the first plate 10 is provided with a fluid passage, the second plate 20 and the first plate 10 form the receiving space 30, the second plate 20 is welded to the first plate 10, the pipe joint 40 is provided in the fluid passage, and the pipe joint 40 is welded to the second plate 20.

In other words, the battery case 100 according to the embodiment of the present invention is mainly composed of the first plate 10, the second plate 20, and the pipe joint 40, wherein a fluid passage may be provided on the first plate 10, the fluid passage may be a part on the first plate 10, and the first plate 10 may be a liquid cooling plate or a heating plate. The fluid channel may be filled with a medium, which may be a pure liquid or a gas-liquid mixed medium, and the like, and is not limited herein. The first panel 10 may serve as a tray floor or ceiling.

The second plate 20 and the first plate 10 may cooperate to define a receiving space 30, and the receiving space 30 may be used to receive the battery cell module. The second plate 20 and the first plate 10 may have substantially the same outer contour, which is advantageous for saving the volume of the battery case 100. The second plate 20 is welded to the first plate 10, wherein the second plate 20 may act as a pallet stringer. Adopt bolted connection between cold drawing among the prior art and the tray, need punch mounting bolt etc. on the cold drawing, this hole will influence the gas tightness. And the utility model discloses a first board 10 can be integrated in an organic whole through welded technology with second board 20, need not to punch on first board 10, is favorable to ensureing the gas tightness in the battery package.

Furthermore, a line connection 40 is provided in the fluid channel, through which line connection 40 fluid can be fed into or discharged from the fluid channel. The cold plate joint in the current battery package is usually not integrated together with the tray, has caused the waste of space and material, is unfavorable for battery package internal tightness. And the utility model discloses an adopt welding process to be connected between pipe joint 40 and the second board 20, not only be favorable to integrating together between pipe joint 40 and the second board 20 through adopting welded technology, practice thrift space and material, but also be favorable to the gas tightness in the guarantee battery package.

Therefore, according to the utility model discloses according to battery case 100 adopts welding mode to connect between first board 10 and the second board 20, also connects through welding mode between second board 20 and the pipe joint 40, not only can practice thrift battery case 100's volume, practices thrift the shared space of battery case 100, but also is favorable to promoting the inside sealed effect of battery package. In addition, by eliminating the conventional tray bottom plate and using the first plate 10 having a temperature adjusting effect as the top plate and/or the bottom plate, cost reduction and weight reduction of the battery pack are facilitated.

According to an embodiment of the present invention, as shown in fig. 5 and 6, the second plate 20 is disposed on one side of the first plate 10 and is connected to the first plate 10 by friction stir welding. After welding, the connected body formed between the first plate 10 and the second plate 20 may be defined as a first welded portion 50, and the first welded portion 50 is formed by friction stir welding. For example, the first plate 10 is positioned below the second plate 20, and a step is provided between the lower end surface of the first plate 10 and the lower end surface of the second plate 20, at which the first welded part 50 is welded by a friction stir welding process.

In some embodiments of the present invention, as shown in fig. 5 and 7, the second plate 20 is provided with a through mounting hole 21, and at least a portion of the pipe joint 40 is located in the mounting hole 21 and welded to the second plate 20, that is, at least a portion of the pipe joint 40 can be inserted into the mounting hole 21, and the pipe joint 40 can be welded to the second plate 20 by a welding process.

According to an embodiment of the present invention, the end surface of the end of the pipe joint 40 on the axis of the mounting hole 21 is connected to the outer side surface of the second plate 20 by arc welding, for example, the first end of the pipe joint 40 extends into the mounting hole 21, and the end surface of the first end of the pipe joint 40 and the outer side surface of the second plate 20 can be welded by the arc welding process, as shown in fig. 2, and the second welding portion 60 is formed by welding. The outer side surface of the pipe joint 40 and the inner wall surface of the mounting hole 21 can be distributed at intervals, so that the pipe joint 40 can be mounted conveniently.

In some embodiments of the present invention, as shown in fig. 6, the mounting hole 21 is an inwardly recessed notch along the edge of the second plate 20, which facilitates the processing to form the mounting hole 21 and the installation of the pipe joint 40.

According to an embodiment of the present invention, as shown in fig. 6 and 7, a step portion 22 is disposed at a position close to the second plate 20 in the gap, the step portion 22 is connected to the outer side surface of the second plate 20 and spaced apart from the inner side surface of the second plate 20, and the step portion 22 is spaced apart from the inner side surface of the second plate 20, so as to facilitate the holding of the pipe joint 40 and the securing of the structural strength of the second plate 20. In addition, the outer side surface of the step portion 32 is welded to the end surface of the pipe joint 40, so that the periphery of the end surface of the pipe joint 40 can be welded conveniently. Wherein the step 32 may be a part of the second plate 20 and is formed by machining.

In some embodiments of the present invention, as shown in fig. 4, the pipe joint 40 includes a first segment 41, a second segment 42 and a third segment 43 connected in sequence, the second segment 42 is located between the first segment 41 and the third segment 43, and the second segment 42 is connected to the first segment 41 and the third segment 43 respectively. The first end of the first segment 41 is connected to the first plate 10, the first end of the second segment 42 is connected to the second end of the first segment 41, the first end of the third segment 43 is connected to the second end of the second segment 42, and the second end of the third segment 43 is welded to the second plate 20. Wherein a through hole is defined in the pipe joint 40, and the through hole can be divided into a first through hole corresponding to the first segment body 41, a second through hole corresponding to the second segment body 42, and a third through hole corresponding to the third segment body 43.

For example, the second plate 20 is positioned above the first plate 10, the first segment 41 extends in the vertical direction, and the second segment 42 extends in the horizontal direction and extends toward the outside of the mounting hole 21. The cross-sectional area of the third segment 43 may be larger than that of the second segment 42, which is beneficial to increase the welding area between the third segment 43 and the second plate 20. The outer peripheral surface of the first segment 41, the outer peripheral surface of the second segment 42, and the outer side surface of the third segment 43 are spaced from the inner wall surface of the mounting hole 21. The first segment 41 may be located on a side of the step portion 22 close to the receiving space 30, at least a portion of the second segment 42 is located above the step portion 22, and the third segment 43 is located above the step portion 22 and spaced apart from the step portion 22.

According to an embodiment of the present invention, as shown in fig. 4, the outer edge of the first plate 10 is provided with a protruding portion 11 corresponding to the notch, the protruding portion 11 is connected to the step portion 22 by friction stir welding, for example, the first plate 10 includes a body and the protruding portion 11, the body can be similar to a rectangle, the outer contour of the second plate 20 can also be similar to a rectangle, which is beneficial to saving the volume of the battery case 100. The protrusion 11 is disposed on the edge of the body, and the first plate 10 may have a structure similar to a Chinese character 'tu'. By using the protruding portion 11 to connect with the stepped portion 22, the volume of the first plate 10 is advantageously reduced.

In some embodiments of the present invention, the first plate 10 is disposed on at least one side of the receiving space 30 in the axial direction, for example, the receiving space 30 extends in the vertical direction, and the first plate 10 may be disposed above the receiving space 30 or below the receiving space 30. That is to say the first plate 10 may act as a bottom plate and/or a top plate.

According to the utility model discloses an embodiment, fluid passage's both ends are inlet and liquid outlet respectively, and pipe joint 40 is located in at least one in inlet and the liquid outlet, and the medium in the fluid passage can flow out through the through-hole, perhaps the medium can flow in fluid passage through the through-hole. For example, when the medium is selected to be cooling liquid, the cooling liquid can flow in through the liquid inlet and flow out through the liquid outlet; and when selecting the medium of gas-liquid mixture, can flow into through the inlet when the refrigeration, the liquid outlet flows out, can flow into through the liquid outlet when heating, and the inlet flows out. That is to say, the liquid inlet can be used for liquid inlet and liquid outlet, and similarly, the liquid outlet can be used for liquid inlet and liquid outlet.

The utility model also discloses a battery package, this battery package includes battery casing 100 and electric core module, and battery casing 100 is the battery casing 100 of above-mentioned arbitrary embodiment. The battery cell module is disposed in the accommodating space 30 of the battery case 100. Because according to the utility model discloses battery case 100 has improved the leakproofness, the cost is reduced, has lightened weight, consequently according to the utility model discloses the battery package also has above-mentioned advantage, does not describe here any more.

Although certain specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A battery case, comprising:

a first plate provided with a fluid channel;

the second plate and the first plate form an accommodating space, and the second plate is welded with the first plate;

a pipe joint disposed in the fluid passage, the pipe joint being welded to the second plate.

2. The battery case as set forth in claim 1, wherein the second plate is provided at one side of the first plate and is connected to the first plate by friction stir welding.

3. The battery case as set forth in claim 1, wherein said second plate is provided with a mounting hole therethrough, and at least a portion of said pipe fitting is located in said mounting hole and welded to said second plate.

4. The battery case according to claim 3, wherein an end surface of one end of the pipe joint on the axis of the mounting hole is connected to an outer side surface of the second plate by arc welding.

5. The battery case according to claim 3, wherein the mounting hole is a notch recessed inward along an edge of the second plate.

6. The battery case as set forth in claim 5, wherein a stepped portion is provided in the notch at a position close to the second plate, the stepped portion being connected to and spaced apart from an outer side surface of the second plate.

7. The battery case as set forth in claim 6, wherein the outer edge of the first plate is provided with a protrusion corresponding to the notch, and the protrusion and the step are connected by friction stir welding.

8. The battery case according to claim 1, wherein the first plate is provided on at least one side in an axial direction of the receiving space.

9. The battery housing of claim 1, wherein the fluid channel has an inlet and an outlet at opposite ends thereof, and the conduit connector is disposed in at least one of the inlet and the outlet.

10. A battery pack, comprising:

a battery case according to any one of claims 1-9;

the battery cell module is arranged in the accommodating space of the battery shell.