CN215451598U

CN215451598U - Battery pack shell and battery pack

Info

Publication number: CN215451598U
Application number: CN202121238634.2U
Authority: CN
Inventors: 陈斌斌; 王华文; 席兵荣; 花黄伟
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2021-03-18
Filing date: 2021-06-03
Publication date: 2022-01-07
Anticipated expiration: 2031-06-03
Also published as: CN113540637A; CN113540638A; WO2022193792A1; CN215451599U

Abstract

The application discloses battery package casing and battery package. The battery shell is used for holding the support frame, the support frame is used for supporting a plurality of battery cells, including having the first casing that holds the chamber, first passageway, the second passageway, first opening, the second opening, third opening and fourth opening, hold the chamber and be used for holding the support frame, first passageway with hold the chamber and pass through first opening intercommunication, the second passageway with hold the chamber and pass through second opening intercommunication, first passageway passes through the third opening intercommunication with the outside of first casing, the second passageway communicates through the fourth opening with the outside of first casing. The battery pack shell can improve the heat dissipation effect of a battery pack and prolong the service life of the battery pack shell.

Description

Battery pack shell and battery pack

Technical Field

The application relates to the field of power batteries, in particular to a battery pack shell and a battery pack.

Background

In the correlation technique, arrange battery module in the battery package casing internally, in order to guarantee the radiating effect of battery package, set up bellied mount table in order to guarantee to have certain clearance between the bottom of battery module and the battery package casing on the battery package casing usually, but above-mentioned mode of setting up causes stress concentration easily, influences the life of battery package casing.

SUMMERY OF THE UTILITY MODEL

The present application is directed to solving at least one of the problems in the prior art. Therefore, the application provides a battery pack shell, which can effectively reduce stress concentration, prolong the service life of the battery pack shell and improve the heat dissipation effect of a battery pack.

The application also provides a battery pack with the battery pack shell.

A battery pack case according to an embodiment of the first aspect of the present application, for accommodating a support frame for supporting a plurality of unit batteries, includes,

the first shell is provided with a containing cavity, a first channel, a second channel, a first opening, a second opening, a third opening and a fourth opening, wherein the containing cavity is used for containing the support frame, the first channel is communicated with the containing cavity through the first opening, the second channel is communicated with the containing cavity through the second opening, the first channel is communicated with the third opening through the outside of the first shell, and the second channel is communicated with the fourth opening through the outside of the first shell.

According to the battery pack shell of the embodiment of the application, at least the following beneficial effects are achieved: through setting the casing to bilayer structure formation ventilation passageway to can make the air get into in the first casing through this ventilation passageway, thereby take place the ventilation effect that the heat exchange can improve the battery package with the battery cell in the first casing, through above-mentioned mode of setting up, need not to set up convex mount table on the casing, consequently can reduce the stress concentration of mounted position, thereby improve the structural strength of battery package casing.

According to some embodiments of the present application, further comprising,

the support frame is used for accommodating a plurality of single batteries and comprises an opening frame and a separation assembly, a fifth opening and a sixth opening are formed in the opening frame, the separation assembly comprises a first separation piece and a second separation piece, the first separation piece and the second separation piece are fixedly connected with the opening frame, a third channel is defined by the first separation piece and the second separation piece, and the separation assemblies are arranged at intervals in a first direction and used for separating the adjacent single batteries; the fifth opening and the sixth opening are located on both sides of the first divider;

the supporting frame is fixedly connected with the first shell, the fifth opening is arranged corresponding to the first opening, the sixth opening is arranged corresponding to the second opening, and airflow enters the first channel through the third opening, then enters the third channel through the first opening and the fifth opening, flows in the third channel, enters the second channel through the sixth opening and the second opening, and then is discharged through the fourth opening.

According to some embodiments of the present application, the first housing includes a first floor and a second floor, the first channel and the second channel each being located between the first floor and the second floor.

According to some embodiments of the present application, the first divider is fixedly coupled to the bottom member of the opening frame.

According to some embodiments of the present application, the second partition includes a first partition, a second partition and a third partition, the first partition and the second partition are oppositely disposed, and both ends of the third partition are fixedly connected with the first partition and the second partition, respectively.

According to some embodiments of the application, further comprising an elastic assembly disposed on the second separator, the elastic assembly extending out of the second separator in the first direction and being for abutting against the unit cells, the first direction being a stacking direction of the cells.

According to some embodiments of the application, the elastic component comprises a first abutting part and a second abutting part, the first abutting part and the second abutting part are arranged oppositely and have gaps, and the first abutting part and the second abutting part can be mutually closed under the expansion effect of the single batteries.

According to some embodiments of the present application, further comprising,

the first pipeline is fixedly connected with the first shell and communicated with the first channel through the third opening;

and the second pipeline is fixedly connected with the first shell and communicated with the second channel through the fourth opening.

According to some embodiments of the present application, further comprising a fan disposed at the first duct or the second duct.

A battery pack according to an embodiment of the second aspect of the present application includes a plurality of battery cells and the battery pack case of the embodiment of the first aspect described above.

Additional aspects and advantages of the present application 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 present application.

Drawings

The present application is further described with reference to the following figures and examples, in which:

fig. 1 is a schematic structural diagram of a battery pack case according to an embodiment of the present application;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic structural diagram of a battery pack case according to another embodiment of the present application;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a sectional view taken along line B-B of FIG. 5;

FIG. 7 is an expanded view of the support frame for placing the single battery according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of the supporting frame in FIG. 7;

FIG. 9 is a top view of FIG. 8;

FIGS. 10-12 show cross-sectional views of different embodiments of section C-C of FIG. 9;

FIG. 13 is a cross-sectional view taken along section D-D of FIG. 9;

fig. 14 is an expanded schematic view of a battery pack according to an embodiment of the present application.

Reference numerals:

the support frame 100, the opening frame 110, the first side member 111, the second side member 112, the bottom member 113, the fifth opening 1131, the sixth opening 1132, the first spacer 120, the second spacer 130, the first spacer 131, the second spacer 132, the third spacer 133, the third channel 140, the elastic member 150, the first abutting member 151, the support portion 1511, the protrusion 1512, the second abutting member 152, and the side mounting plate 160;

single battery 200, first pipeline 300, second pipeline 400

First casing 500, first bottom plate 511, second bottom plate 512, riser 513, first channel 520, second channel 530, first opening 540, second opening 550, third opening 560, fourth opening 570; receiving chamber 580

A second housing 600, a BDU, and a BMS 700.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.

In the description of the present application, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present number, and the above, below, within, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," 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 present application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

A battery pack holder according to an embodiment of the first aspect of the present application will be described with reference to fig. 1 to 7.

The battery pack shell is used for accommodating the support frame 100, the support frame 100 is used for supporting a plurality of single batteries 200, the battery pack shell comprises a first shell 500, the first shell 500 is provided with an accommodating cavity 580, a first channel 520, a second channel 530, a first opening 540, a second opening 550, a third opening 560 and a fourth opening 570, the first channel 520 and the accommodating cavity 580 are communicated through the first opening 540, the second channel 530 is communicated with the accommodating cavity 580 through the second opening 550, the first channel 520 is communicated with the outside of the first shell 500 through the third opening 560, and the second channel 530 is communicated with the fourth opening 570 through the outside of the first shell 500.

Specifically, as shown in fig. 1 to 3 and 7, the battery pack housing includes a first housing 500 and a second housing 600, the first housing 500 has a receiving cavity 580, and the receiving cavity 580 is used for receiving the support frame 100.

The first casing 500 is a casing having an opening, and the second casing 600 covers the first casing 500. The bottom of the first casing 500 is a double-layer bottom plate structure, and includes a first bottom plate 511, a second bottom plate 512 and a plurality of risers 513 arranged along the Y direction at intervals, the first bottom plate 511 and the second bottom plate 512 are arranged in parallel at intervals, the second bottom plate 512 is located above the first bottom plate 511, the second bottom plate 512, the inner space formed by the side wall of the first casing 500 and the risers 513 forms a first channel 520, and the inner space formed by the first bottom plate 511, the second bottom plate 512 and the two risers 513 forms a second channel 530. The second bottom plate 512 is provided with a first opening 540 and a second opening 550, the first opening 540 and the second opening 550 both extend along the X-axis direction, the first opening 540 is communicated with the first channel 520, the second opening 550 is communicated with the second channel 530, a side wall of the first housing 500 in the X-axis direction is provided with a third opening 560, the second bottom plate 512 (i.e. the bottom of the first housing 500) is provided with a fourth opening 570, by the above arrangement, external air can enter the first channel 520 through the third opening 560 and can enter the accommodating cavity 580 through the first opening 540 after circulating in the first channel 520, and air in the accommodating cavity 580 enters the second channel 530 through the second opening 550 and is discharged to the outside of the first housing 500 through the fourth opening 570. Two first openings 540 and two second openings 550 are shown in fig. 1, and it is understood that corresponding openings may be provided according to the number of the support frames 100 or the specific structure of the support frames to allow airflow to flow into the interior of the support frame 100, thereby improving the heat dissipation performance of the battery pack. Both the first and

second passages

520 and 530 are provided at the bottom of the first housing 500 as shown in fig. 1, and it is understood that both side portions of the first housing 500 in the Y direction may be provided in a double-layered structure, and the respective first and second passages are provided, and the respective openings are provided according to the first and second passages, so that the external air flows into the accommodating chamber through the passages, and the air inside the accommodating chamber is discharged outside the first housing 500 through the passages.

In some embodiments of the present application, the battery pack case further includes a support frame 100, the support frame 100 is configured to accommodate a plurality of unit batteries 200, the support frame 100 includes an opening frame 110 and a partition assembly, the opening frame 110 is provided with a fifth opening 1131 and a sixth opening 1132, the partition assembly includes a first partition 120 and a second partition 130, the first partition 120 and the second partition 130 are fixedly connected to the opening frame 110, the first partition 120 and the second partition 130 define a third channel 140, the plurality of partition assemblies are spaced apart in a first direction and are configured to partition adjacent unit batteries, the fifth opening 1131 and the sixth opening 1132 are located at two sides of the first partition 120, the support frame is fixedly connected to the first case, the fifth opening 1131 is disposed opposite to the first opening 540, the sixth opening 1132 is disposed opposite to the second opening 550, after air flows through the third opening 560 into the first channel 520, enters the third channel 140 through the first opening 540 and the fifth opening 1131, flows in the third channel 140, enters the second channel 530 through the sixth opening 1132 and the second opening 550, and is discharged through the fourth opening 570.

Specifically, as shown in fig. 9 and 10, the opening frame 110 includes two oppositely disposed first side members 111, two oppositely disposed second side members 112 and a bottom member 113, the first side members 111 extend in an X direction, and the second side members 112 extend in a Y direction, where the X direction is a stacking direction of the unit batteries 200 (i.e., the first direction is also a length direction of the support stand 100). As shown in fig. 9, the partition assembly includes a first partition 120 and a second partition 130, the first partition 120 is fixedly connected to the bottom member 113, the second partition 130 is fixedly connected to the first side member 111, and the first partition 120 and the second partition 130 have a space therebetween, i.e., a third passage 140 is formed between the first partition 120 and the second partition 130. The plurality of partition members are disposed at intervals along the first direction, the partition members partition the opening frame 110 into a plurality of sub-spaces, and the unit cells are disposed in the sub-spaces, so that the support frame 100 can accommodate (or support) the plurality of unit cells. The adjacent single batteries are separated by the separation component, so that the adjacent single batteries are not in direct contact. The bottom member 113 is provided with fifth and

sixth openings

1131 and 1132, and the fifth and

sixth openings

1131 and 1132 are located on both sides of each first partition member 120 in the Y direction. The fifth opening 1131 and the sixth opening 1132 have an integrated opening structure. The fifth opening 1131 and the sixth opening 1132 may also be a plurality of openings distributed at intervals, and the number of the fifth openings 1131 and the number of the sixth openings 1132 are the same as the number of the first separating members 120.

The supporting frame 100 is fixedly connected to the first housing 500, the fifth opening 1131 is disposed corresponding to the first opening 540, and the sixth opening 1132 is disposed corresponding to the second opening 550. The first and

second dividers

120, 130 in each divider assembly define a third channel 140 with a set spacing between the first and

second dividers

120, 130. When the single cells 200 are all placed in the support frame 100, a certain distance is provided between two adjacent single cells 200 due to the arrangement of the separation assembly. Air can enter the first channel 520 from the third opening 560, diffuse in the first channel 520, and enter the third channel 140 through the first opening 540 and the fifth opening 1131, and after flowing in the third channel 140, the air enters the second channel 530 through the sixth opening 1132 and the second opening 550 to be collected, and then is discharged to the outside of the first housing 500 through the fourth opening 570. Through the above arrangement, the air flow outside the first housing 500 can enter the first housing 500 and flow between the two adjacent single batteries 200, so that the heat of the single batteries 200 is taken away, and the single batteries 200 are cooled. The supporting frame 100 and the first casing 500 may be connected non-detachably (e.g., welded or glued) or detachably (e.g., bolted), side mounting plates 160 are further disposed on two sides of the supporting frame 100 in the Y direction, that is, as shown in fig. 8, the two side mounting plates 160 are both located outside the opening frame 110, the side mounting plates 160 are in an L-shaped structure and have a first mounting portion 410 and a second mounting portion 420, the first mounting portion 410 is fixedly connected to the first side member 111, and the second mounting portion 420 is fixedly connected to the second bottom plate 512. The support frame 100 is placed in the receiving cavity 580 of the first casing 500 and placed on the second bottom plate 512, such that the fifth opening 1131 is disposed corresponding to the first opening 540, and the sixth opening 1132 is disposed corresponding to the second opening 550, thereby forming the lower casing of the battery pack. Since the first partition member 120 partitions the opening frame 110 into a plurality of sub-spaces for accommodating the unit batteries 200, the plurality of unit batteries 200 may be inserted into the sub-spaces in the opening frame 110 during the assembly of the battery pack. After the unit cells 200 are inserted, the unit cells 200, the first and

second spacers

120 and 130, and the opening frame 110 define a third channel 140 therebetween. As shown in fig. 4 to 6, the air outside the first casing 500 enters the first channel 520 through the third opening 560, the airflow flows along the first channel 520 and enters each third channel 140 through the first opening 540 (the fifth opening 1131), the airflow in each third channel 140 is collected in the second channel 530 through the second opening 550 (the sixth opening 1132), the airflow collected in the second channel 530 is discharged to the outside of the first casing 500 through the fourth opening 570, and the airflow path of the air inside the first casing 500 and the opening frame 110 is as shown in fig. 6. The air current can flow in third passageway 140, and the air current can take place the heat exchange with the battery cell promptly, takes away the heat of battery cell 200, cools down battery cell 200 to improve the heat dispersion of battery package. In addition, the above manner can simplify the assembly process of the battery pack, and the single battery 200 is inserted into the support frame 100, so that the accumulated error of the single battery 200 in the stacking process can be reduced, and the assembly precision of the battery pack can be improved.

The support stand 100 shown in fig. 7 to 9 can stack only one row of unit cells in the X direction, and thus two support stands 100 shown in fig. 7 to 9 may be disposed in the Y direction within the first case 500 shown in fig. 1. It is understood that the first housing 500 may also accommodate only one support frame 100 shown in fig. 7 to 9 or other number of support frames 100, and the passage and opening structure on the first housing 500 may be arranged according to the number of the support frames 100.

The first separating member 120 shown in fig. 7 to 9 is disposed on the bottom member 113, and it is understood that in some other embodiments, the first separating member 120 may be disposed on a first side member 111 and fixedly connected to the first side member 111, the first side member 111 is provided with a fifth opening 1131 and a sixth opening 1132, and the fifth opening 1131 and the sixth opening 1132 are respectively disposed on two sides of the first separating member 120. The first and

second dividers

120, 130 define a third channel 140. In this way, the fifth opening 1131 and the sixth opening 1132 are located at the side of the support frame 100, and accordingly, in order to make the external airflow enter the first casing 500 and act on the inside of the support frame 100, the side wall of the first casing 500 is configured as a double-layer structure and forms a corresponding airflow channel and opening.

While only one row of the first partitions 120 is disposed in the opening frame 110 shown in fig. 7 to 9, in other embodiments, a plurality of rows of partition assemblies (the first partitions 120 and the second partitions 130) (e.g., two rows and three rows … …) disposed in the Y direction may be disposed in a single opening frame 110 to form the support frame 100, the support frame 100 is also an integrated structure, the single cells 200 are inserted into the sub-spaces of the opening frame 110, and the single cells in the opening frame 110 are also distributed in a plurality of rows in the Y direction. The plurality of rows of first separators 120 may be all provided on the bottom member 113 of the opening frame 110, or the first separators 120 of the first row and the last row in the Y direction may be provided on the first side member 111 of the opening frame 110, and the first separators 120 of the remaining rows may be provided on the bottom member 113 of the opening frame 110.

As shown in fig. 10, the first partition member 120 may have an arc-shaped configuration in the YZ plane, and air flows in through one of the fifth and

sixth openings

1131 and 1132, flows along the outer edge of the first partition member 120, and flows out through the other of the fifth and

sixth openings

1131 and 1132, so that the air path has a U-shape. It will be appreciated that in other embodiments, as shown in fig. 11, the first divider 120 may have a fan-shaped profile in the YZ plane, with the air flowing in through one of the fifth and

sixth openings

1131, 1132, along the outer edge of the first divider 120, and out through the other of the fifth and

sixth openings

1131, 1132, and with the air path also being substantially U-shaped. In still other embodiments, as shown in fig. 12, the first partition 120 is composed of a square portion (which is square or rectangular) and an arc portion in the YZ plane, the air flows along the edge of the first partition 120, and the air path has a U-shape. In some embodiments, when the first separator 120 is fixedly mounted on the bottom member 113, the height of the first separator 120 in the Z direction is not more than half of the height of the unit cell 200 in the Z direction; when the first separator 120 is fixed to a first side member 111, the length of the first separator 120 in the Y direction is not more than half of the length of the unit cell 200 in the Y direction. Because the middle region of the single battery 200 has the largest expansion amount in the process of charging and discharging the single battery 200, air can flow through the middle region of the single battery 200, and the heat dissipation performance of the battery module is further improved.

In some specific embodiments, the second partition 130 includes a first partition 131, a second partition 132, and a third partition 133, the first partition 131 and the second partition 132 are oppositely disposed, one end of the third partition 133 is fixedly connected to an end of the first partition 131, and the other end of the third partition is fixedly connected to an end of the second partition 132, and the second partition 130 is integrally formed in a door frame type structure. When the first divider 120 is fixedly coupled with the bottom member 113, the first divider 131 of the second divider 130 is fixedly coupled with one first side member 111, the second divider 132 of the second divider 130 is fixedly coupled with the other first side member 111, and the third divider 133 of the second divider 130 is flush with the top of the opening frame 110. When the first divider 120 is fixedly connected with the first side member 111, the first partition 131 of the second divider 130 is fixedly connected with the bottom member 113, the third partition 133 of the second divider 130 is fixedly connected with the other first side member 111, and the second partition 132 of the second divider 130 is flush with the top of the opening frame 110. It is understood that the second separator 130 includes only a first separator 131 and a second separator 132, the first separator 131 and the second separator 132 are oppositely disposed, the first separator 131 is fixedly connected to a first side member 111, the second separator 132 is fixedly connected to another first side member 111, the first side member 111 forms a clamping groove with two adjacent first separators 131 thereon for clamping one side of the single battery 200, and the another first side member 111 forms a clamping groove with two adjacent first separators 131 thereon for clamping the other side of the single battery 200.

In some embodiments of the present disclosure, the battery pack further includes an elastic assembly 150, the elastic assembly 150 is disposed on the second separator 130, the elastic assembly 150 extends out of the second separator 130 along a first direction, the elastic assembly 150 is used for abutting against the single battery 200, and the first direction is a stacking direction of the single battery 200.

Specifically, as shown in fig. 4 to 7, the elastic member 150 is provided on the second separator 130, and the elastic member 150 protrudes toward both sides of the second separator 130 in the X direction (i.e., the first direction, the stacking direction of the unit batteries 200) for abutting against the unit batteries 200. Because the single battery 200 can be heated and expanded in the process of charging and discharging, in order to ensure the working performance of the single battery 200 and avoid the occurrence of thermal runaway due to the absence of an expansion space, along the X direction, the distance between two adjacent second spacers 130 is slightly greater than the thickness of the single battery 200 in the X direction, so as to provide a certain expansion space for the single battery 200, but because the distance between two adjacent second spacers 130 is greater than the thickness of the single battery 200, the single battery 200 may shake, and in order to ensure the stability of the single battery 200, the elastic assembly 150 is arranged on the second spacers 130. In the case where the unit cell 200 is not expanded, the elastic member 150 abuts against the unit cell 200, thereby fixing the unit cell 200. During the swelling of the unit cells 200, the unit cells 200 compress the elastic assembly 150 to abut the second separator 130. Through the above arrangement, a certain expansion space can be provided for the single battery 200, and the transition expansion of the single battery 200 can be avoided, so that the stability of the single battery 200 is improved.

In some specific embodiments, as shown in fig. 13, the elastic component 150 includes a first abutting member 151 and a second abutting member 152, the first abutting member 151 and the second abutting member 152 are disposed opposite to each other with a gap, the first abutting member 151 includes a supporting portion 1511 and a protruding portion 1522, one end of the supporting portion 1511 is fixedly connected to the second spacer 130, the supporting portion 1511 and the second spacer 130 are located on the same plane and extend in a direction away from the second spacer 130, the end of the supporting portion 1511 is provided with a protruding portion 1512, and the protruding portion 1512 extends in the X direction and extends in a direction away from the second spacer 130 and the second abutting member 152. The first abutment 151 and the second abutment 152 have the same structure, and the abutment portion of the second abutment 152 extends in a direction away from the first abutment 151. Under the condition that the single battery 200 is not expanded, the single battery 200 has a certain gap from the second separating member 130, two adjacent single batteries 200 are respectively abutted against the convex part of the first abutting member 151 and the convex part of the second abutting member 152, when the single battery 200 is expanded, the two adjacent single batteries 200 respectively extrude the first abutting member 151 and the second abutting member 152, the supporting part of the first abutting member 151 and the supporting part of the second abutting member 152 are elastically deformed, namely, the convex part of the first abutting member 151 and the convex part of the second abutting member 152 are mutually close in the X direction, and the single battery 200 can be abutted against the second separating member 130. As shown in fig. 10 to 12, when the second partition 132 has a gate-type structure, one elastic member 150 is disposed at each of the lower ends of the first partition 131 and the second partition 132, and two elastic members 150 are disposed below the third partition 133 at intervals. It is understood that the elastic members 150 on the first and

second partitions

131 and 132 may also extend in the Y direction, i.e., the elastic members 150 on the first partition 131 extend out of the first partition 131 and toward the second partition 132, and the elastic members 150 on the second partition 132 extend out of the second partition 132 and toward the first partition 131. It is understood that the number of the elastic members 150 on the second separator 130 may be set according to the size of the unit battery 200.

In some embodiments of the present application, the junction of the second spacer 130 and the side member is connected by a circular arc transition. Specifically, the second partition 130 is fixedly connected to the first side member 111, and a connection between the second partition 130 and the first side member 111 is a circular arc transition. Through the above manner, the single battery 200 can be better attached to the opening frame 110 and the second separator 130, and the stress concentration at the joint of the two can be reduced, thereby improving the structural performance of the battery pack case.

In some embodiments of the present application, a first pipe 300 and a second pipe 400 are further included, the first pipe 300 is fixedly connected to the first housing 500 and communicates with the first channel 520 through the third opening 560, and the second pipe 400 is fixedly connected to the first housing 500 and communicates with the second channel 530 through the fourth opening 570.

Specifically, as shown in fig. 14, in order to facilitate introduction of external air into the battery pack case and discharge of air inside the battery pack case, a first duct 300 and a second duct 400 are provided, and the first duct 300 and the second duct 400 guide air. The orientation of the first and

second conduits

300 and 400 may be set according to actual requirements. The first duct 300 is fixedly connected to a sidewall of the first housing 500, and the second duct 400 is fixedly connected to a bottom of the first housing 500. The first duct 300 is an air inlet duct, the second duct 400 is an air outlet duct, air enters the first duct 300 and enters the first channels 520 through the third openings 560, air flows in the first channels 520 and enters each third channel 140 through the first openings 540 (and the fifth openings 1131), the air flows in the third channels 140 and acts on the surface of the single battery 200 to exchange heat with the single battery 200, heat of the single battery 200 is taken away and then enters the second channels 530 through the second openings 550 (and the sixth openings 1132), and hot air in each third channel 140 is collected in the second channels 530 and then enters the second ducts 800 through the fourth openings 570 to be discharged. The air can take away the heat on the surface of the single battery 200 in the flowing process, so that the internal structure of the battery pack is cooled. It is understood that the first duct 300 may be an exhaust duct and the second duct 400 may be an intake duct, and the air flows in a direction opposite to the air flow direction of the first duct 300. In order to further improve the heat dissipation performance of the battery pack, a fan may be disposed on the first duct 300 or the second duct 400, and the rotation of the fan increases the speed of air flow, so that the air can take away more heat of the single battery 200, thereby improving the heat dissipation performance of the battery pack.

A battery pack according to an embodiment of the second aspect is described below, including a plurality of unit batteries and a battery pack case.

Specifically, the battery pack is assembled in such a way that the support frame 100 and the first housing 500 are assembled to form a lower housing structure, the plurality of support frames 100 can be fixed to the first housing 500 respectively when the plurality of support frames 100 are arranged in the first housing 500, the plurality of support frames 100 can be arranged to be integrated into a structure without intervals in the Y direction, and then the integrated support frame is assembled with the first housing 500. After the lower case is assembled, the unit batteries 200 are sequentially inserted into the sub-spaces of the support frame 100, the BMS and the BDU700 are mounted in the lower case, and the second case 600 is fastened to the first case 500, thereby completing the packaging of the battery pack. The battery pack with the structure can further simplify the assembly process, reduce the arrangement of related parts in the assembly process, improve the assembly efficiency and save the cost.

The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present application. Furthermore, the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

Claims

1. A battery pack housing for receiving a support frame for supporting a plurality of battery cells, comprising,

2. The battery pack housing of claim 1, further comprising,

3. The battery pack housing of claim 2, wherein the first housing comprises a first floor and a second floor, the first channel and the second channel each being located between the first floor and the second floor.

4. The battery pack case according to claim 2, wherein the first separator is fixedly coupled to the bottom member of the opening frame.

5. The battery pack case according to claim 2, wherein the second separator includes a first separator, a second separator, and a third separator, the first separator and the second separator being disposed opposite to each other, and both ends of the third separator being fixedly connected to the first separator and the second separator, respectively.

6. The battery pack housing according to claim 4, further comprising an elastic member provided on the second separator, the elastic member protruding out of the second separator in the first direction and being configured to abut the unit cells, wherein the first direction is a stacking direction of the unit cells.

7. The battery pack case of claim 6, wherein the elastic assembly comprises a first abutting part and a second abutting part, the first abutting part and the second abutting part are arranged oppositely and have gaps, and the first abutting part and the second abutting part can be mutually closed under the expansion effect of the single batteries.

8. The battery pack housing according to claim 2, further comprising,

9. The battery pack housing of claim 8, further comprising a fan disposed at the first duct or the second duct.

10. A battery pack comprising a plurality of battery cells and a battery pack housing according to any one of claims 2 to 9.