Battery pack housing and battery pack

Abstract

The present application discloses a battery pack housing and a battery pack. The battery pack housing is used to accommodate a support frame, and the support frame is used to support a plurality of single cells, including a first housing having a receiving cavity, a first channel, a second channel, a first opening, a second opening, a third opening, and a fourth opening. The receiving cavity is used to accommodate the support frame. The first channel and the receiving cavity communicate with each other through the first opening. The second channel and the receiving cavity communicate with each other through the second opening. The first channel communicates with the outside of the first housing through the third opening. The second channel communicates with the outside of the first housing through the fourth opening. The battery pack housing of the present application can improve the heat dissipation effect of the battery pack and the service life of the battery pack housing.

Description

Technical Field

[0001] This application relates to the field of power batteries, and particularly to a battery pack housing and a battery pack. Background Art

[0002] In the related art, a battery module is placed inside a battery pack housing. To ensure the heat dissipation effect of the battery pack, a raised mounting platform is usually provided on the battery pack housing to ensure a certain gap between the bottom of the battery module and the battery pack housing. However, the above setting method is prone to stress concentration, affecting the service life of the battery pack housing. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application proposes a battery pack housing, which can effectively reduce stress concentration, improve the service life of the battery pack housing and improve the heat dissipation effect of the battery pack.

[0004] This application also proposes a battery pack having the above battery pack housing.

[0005] The battery pack housing according to the first aspect embodiment of this application is used to accommodate a support frame, and the support frame is used to support a plurality of single cells, including,

[0006] A first housing, the first housing has a receiving cavity, a first channel, a second channel, a first opening, a second opening, a third opening and a fourth opening, wherein the receiving cavity is used to accommodate the support frame, the first channel and the receiving cavity are communicated through the first opening, the second channel and the receiving cavity are communicated through the second opening, the first channel is communicated with the outside of the first housing through the third opening, and the second channel is communicated with the outside of the first housing through the fourth opening.

[0007] The battery pack housing according to the embodiment of this application has at least the following beneficial effects: By setting the housing into a double-layer structure to form a ventilation channel, air can enter the first housing through the ventilation channel, and then heat exchange occurs with the single cells in the first housing, which can improve the ventilation effect of the battery pack. Through the above setting method, there is no need to set a protruding mounting platform on the housing, so stress concentration at the mounting position can be reduced, thereby improving the structural strength of the battery pack housing.

[0008] According to some embodiments of this application, it further includes,

[0009] Support frame, the support frame is used to accommodate a plurality of single cells, the support frame includes an open frame and a partition assembly, the open frame is provided with a fifth opening and a sixth opening, the partition assembly includes a first partition and a second partition, both the first partition and the second partition are fixedly connected to the open frame, the first partition and the second partition define a third channel, and a plurality of the partition assemblies are arranged at intervals in a first direction and are used to separate adjacent single cells; the fifth opening and the sixth opening are located on both sides of the first partition;

[0010] The support frame is fixedly connected to the first housing, the fifth opening is correspondingly arranged with the first opening, the sixth opening is correspondingly arranged with the second opening, after the air flow enters the first channel through the third opening, it enters the third channel through the first opening and the fifth opening, and after flowing in the third channel, it enters the second channel through the sixth opening and the second opening, and then is discharged through the fourth opening.

[0011] According to some embodiments of the present application, the first housing includes a first bottom plate and a second bottom plate, and both the first channel and the second channel are located between the first bottom plate and the second bottom plate.

[0012] According to some embodiments of the present application, the first partition is fixedly connected to the bottom member of the open frame.

[0013] According to some embodiments of the present application, the second partition includes a first partition portion, a second partition portion and a third partition portion, the first partition portion and the second partition portion are arranged oppositely, and both ends of the third partition portion are fixedly connected to the first partition portion and the second partition portion respectively.

[0014] According to some embodiments of the present application, it further includes an elastic assembly, the elastic assembly is arranged on the second partition, along the first direction, the elastic assembly extends out of the second partition and is used to abut against the single cell, and the first direction is the stacking direction of the batteries.

[0015] According to some embodiments of the present application, the elastic assembly includes a first abutting member and a second abutting member, the first abutting member and the second abutting member are arranged oppositely and have a gap, and the first abutting member and the second abutting member can approach each other under the action of the expansion of the single cell.

[0016] According to some embodiments of the present application, it further includes,

[0017] A first pipeline, the first pipeline is fixedly connected to the first housing and is communicated with the first channel through the third opening;

[0018] A second pipeline, which is fixedly connected to the first housing and communicates with the second channel through the fourth opening.

[0019] According to some embodiments of the present application, a fan is further included, and the fan is disposed in the first pipeline or the second pipeline.

[0020] The battery pack according to the embodiment of the second aspect of the present application includes a plurality of single cells and the battery pack housing of the above-mentioned embodiment of the first aspect.

[0021] The additional aspects and advantages of the present application will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present application. Description of the Drawings

[0022] The following further describes the present application in conjunction with the drawings and embodiments, where:

[0023] Figure 1 It is a schematic structural diagram of a battery pack housing according to an embodiment of the present application;

[0024] Figure 2 is Figure 1 the top view of;

[0025] Figure 3 is Figure 2 the sectional view taken along the A-A section in;

[0026] Figure 4 It is a schematic structural diagram of a battery pack housing in another embodiment of the present application;

[0027] Figure 5 is Figure 4 the top view of;

[0028] Figure 6 is Figure 5 the sectional view taken along the B-B section in;

[0029] Figure 7 It is an unfolded schematic diagram of a support frame for placing single cells in an embodiment of the present application;

[0030] Figure 8 is Figure 7 the structural schematic diagram of the support frame in;

[0031] Figure 9 is Figure 8 the top view;

[0032] Figures 10 to 12 shows Figure 9 the sectional views of different embodiments of the C-C section in;

[0033] Figure 13 is Figure 9Cross-sectional view of the D-D section;

[0034] Figure 14 Schematic diagram of the battery pack deployment in the embodiment of the present application.

[0035] Reference numerals:

[0036] Support frame 100, open frame 110, first side member 111, second side member 112, bottom member 113, fifth opening 1131, sixth opening 1132, first partition member 120, second partition member 130, first partition portion 131, second partition portion 132, third partition portion 133, third channel 140, elastic component 150, first abutting member 151, supporting portion 1511, protruding portion 1512, second abutting member 152, side mounting plate 160;

[0037] Single battery 200, first pipe 300, second pipe 400

[0038] First housing 500, first bottom plate 511, second bottom plate 512, vertical plate 513, first channel 520, second channel 530, first opening 540, second opening 550, third opening 560, fourth opening 570; receiving cavity 580

[0039] Second housing 600, BDU and BMS 700. Detailed implementation manners

[0040] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0041] In the description of the present application, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0042] In the description of the present application, the meaning of several is more than one, and the meaning of multiple is more than two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0043] In the description of the present application, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above terms in the present application in combination with the specific content of the technical solution.

[0044] In the description of the present application, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] The following will describe the battery pack bracket according to the first aspect embodiment of the present application in conjunction with the attached Figure 1 to the attached Figure 7 drawings.

[0046] A battery pack housing for accommodating a support frame 100, the support frame 100 being used to support a plurality of single cells 200, the battery pack housing including a first housing 500 having a receiving 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 receiving cavity 580 being in communication through the first opening 540, the second channel 530 and the receiving cavity 580 being in communication through the second opening 550, the first channel 520 being in communication with the outside of the first housing 500 through the third opening 560, and the second channel 530 being in communication with the fourth opening 570 through the outside of the first housing 500.

[0047] Specifically, as Figures 1 to 3 , Figure 7 shown, the battery pack housing includes a first housing 500 and a second housing 600, the first housing 500 having a receiving cavity 580 for accommodating the support frame 100.

[0048] The first housing 500 is a housing with an opening, and the second housing 600 covers the first housing 500. The bottom of the first housing 500 is a double-layer bottom plate structure, including a first bottom plate 511, a second bottom plate 512, and a plurality of vertical plates 513 arranged at intervals in the Y direction. The first bottom plate 511 and the second bottom plate 512 are arranged in parallel at intervals, and the second bottom plate 512 is located above the first bottom plate 511. The internal space formed by the first bottom plate 511, the second bottom plate 512, the side wall of the first housing 500, and the vertical plates 513 forms a first channel 520, and the internal space formed by the first bottom plate 511, the second bottom plate 512, and two vertical plates 513 forms a second channel 530. The second bottom plate 512 is provided with a first opening 540 and a second opening 550. Both the first opening 540 and the second opening 550 extend in the X-axis direction. The first opening 540 is communicated with the first channel 520, and the second opening 550 is communicated with the second channel 530. A third opening 560 is provided on one side wall of the first housing 500 in the X direction, and a fourth opening 570 is provided on the second bottom plate 512 (i.e., the bottom of the first housing 500). Through the above arrangement, external air can enter the first channel 520 through the third opening 560, and after flowing in the first channel 520, it can enter the accommodation cavity 580 through the first opening 540. The gas in the accommodation 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. Figure 1 Two first openings 540 and two second openings 550 are shown in Figure 1 . It can be understood that the corresponding openings can be set according to the number of the support frames 100 or the specific structure of the support frames, so that the air flow can flow into the interior of the support frames 100, thereby improving the heat dissipation performance of the battery pack. Figure 1 Both the first channel 520 and the second channel 530 shown in Figure 1 are provided at the bottom of the first housing 500. It can be understood that the two side portions of the first housing 500 in the Y direction can also be set as a double-layer structure, and the corresponding first channel and second channel are provided, and the corresponding openings are set according to the first channel and the second channel, so that the external air flow enters the accommodation cavity through the channels, and the gas inside the accommodation cavity is discharged to the outside of the first housing 500 through the channels.

[0049] In some specific embodiments of the present application, the battery pack housing further includes a support frame 100 for accommodating a plurality of single cells 200. The support frame 100 includes an open frame 110 and a partitioning assembly. The open frame 110 is provided with a fifth opening 1131 and a sixth opening 1132. The partitioning assembly includes a first partitioning member 120 and a second partitioning member 130. Both the first partitioning member 120 and the second partitioning member 130 are fixedly connected to the open frame 110. The first partitioning member 120 and the second partitioning member 130 define a third channel 140. A plurality of partitioning assemblies are arranged at intervals in the first direction and are used to partition adjacent single cells. The fifth opening 1131 and the sixth opening 1132 are located on both sides of the first partitioning member 120. The support frame is fixedly connected to the first housing. The fifth opening 1131 is disposed opposite to the first opening 540, and the sixth opening 1132 is disposed opposite to the second opening 550. After the air flow enters the first channel 520 through the third opening 560, it enters the third channel 140 through the first opening 540 and the fifth opening 1131, flows in the third channel 140, and then enters the second channel 530 through the sixth opening 1132 and the second opening 550, and is discharged through the fourth opening 570.

[0050] Specifically, as Figure 9 and Figure 10 shown, the open frame 110 includes two relatively arranged first side members 111, two relatively arranged second side members 112, and a bottom member 113. The first side member 111 extends in the X direction, and the second side member 112 extends in the Y direction, where the X direction is the stacking direction of the single cells 200 (i.e., the first direction and also the length direction of the support frame 100). As Figure 9 shown, the partitioning assembly includes a first partitioning member 120 and a second partitioning member 130. The first partitioning member 120 is fixedly connected to the bottom member 113, and the second partitioning member 130 is fixedly connected to the first side member 111. There is a spacing between the first partitioning member 120 and the second partitioning member 130, that is, a third channel 140 is formed between the first partitioning member 120 and the second partitioning member 130. A plurality of partitioning assemblies are arranged at intervals in the first direction. The partitioning assemblies divide the open frame 110 into a plurality of sub-spaces, and the single cells are placed in the sub-spaces, so that the support frame 100 can accommodate (or support) a plurality of single cells. Adjacent single cells are separated by the partitioning assembly, so that adjacent single cells do not directly contact each other. The bottom member 113 is provided with a fifth opening 1131 and a sixth opening 1132. In the Y direction, the fifth opening 1131 and the sixth opening 1132 are located on both sides of each first partitioning member 120. The fifth opening 1131 and the sixth opening 1132 are an integral opening structure. The fifth opening 1131 and the sixth opening 1132 can also be a plurality of spaced-apart openings. The number of the fifth opening 1131 and the number of the sixth opening 1132 are both the same as the number of the first partitioning members 120.

[0051] The support frame 100 is fixedly connected to the first housing 500. The fifth opening 1131 and the first opening 540 are correspondingly arranged, and the sixth opening 1132 and the second opening 550 are correspondingly arranged. The first partition member 120 and the second partition member 130 in each partition assembly both define a third channel 140, and there is a set interval between the first partition member 120 and the second partition member 130. When all the single cells 200 are placed in the support frame 100, due to the arrangement of the partition assembly, there is a certain distance between two adjacent single cells 200. Air can enter the first channel 520 from the third opening 560, diffuse in the first channel 520, enter the third channel 140 through the first opening 540 and the fifth opening 1131, flow in the third channel 140 and then enter the second channel 530 through the sixth opening 1132 and the second opening 550 to converge, and then be discharged outside the first housing 500 through the fourth opening 570. Through the above arrangement, the airflow outside the first housing 500 can enter the interior of the first housing 500 and flow between two adjacent single cells 200, thereby taking away the heat of the single cells 200 and cooling the single cells 200. The support frame 100 and the first housing 500 can be connected in a non-detachable manner (such as welding or gluing), or can be connected in a detachable manner (such as bolt fixation). Side mounting plates 160 are also provided on both sides of the support frame 100 in the Y direction, that is, as Figure 8 shown, both of the two side mounting plates 160 are located outside the opening frame 110. The side mounting plate 160 has an L-shaped structure and has 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. Place the support frame 100 in the accommodation cavity 580 of the first housing 500 and on the second bottom plate 512, so that the fifth opening 1131 and the first opening 540 are correspondingly arranged, and the sixth opening 1132 and the second opening 550 are correspondingly arranged, thereby forming the lower housing of the battery pack. Since the first partition member 120 divides the opening frame 110 into several sub-spaces for accommodating the single cells 200, during the assembly process of the battery pack, multiple single cells 200 can be inserted into the sub-spaces in the opening frame 110. After inserting the single cells 200, a third channel 140 is defined between the single cells 200, the first partition member 120, the second partition member 130, and the opening frame 110. Combining with the attached Figure 4 to the attached Figure 6As shown, the air outside the first housing 500 enters the first channel 520 through the third opening 560. The air flow flows along the first channel 520 and enters each third channel 140 through the first opening 540 (the fifth opening 1131). The air flow in each third channel 140 converges in the second channel 530 through the second opening 550 (the sixth opening 1132). The air flow converged in the second channel 530 is discharged to the outside of the first housing 500 through the fourth opening 570. The air flow path of the gas in the first housing 500 and the opening frame 110 is as Figure 6 shown. The air flow can flow in the third channel 140, that is, the air flow can exchange heat with the single battery, take away the heat of the single battery 200, cool the single battery 200, and thus improve the heat dissipation performance of the battery pack. And the above method can simplify the assembly process of the battery pack. Inserting the single battery 200 into the support frame 100 can reduce the cumulative error during the stacking of the single batteries 200 and improve the assembly accuracy of the battery pack.

[0052] Figures 7 to 9 The support frame 100 shown in Figure 1 can only stack a column of single batteries in the X direction. Therefore, Figures 7 to 9 two support frames 100 shown in Figure 9 can be arranged in the Y direction in the first housing 500 shown. It can be understood that the first housing 500 can also only accommodate one support frame 100 shown in FIGS. 7 to

[0053] Figures 7 to 9 or other numbers of support frames 100, and the channel and opening structures on the first housing 500 are set according to the number of support frames 100.

[0054] Figures 7 to 9Only one row of first partition members 120 is provided within the open frame 110 shown. In some other embodiments, multiple rows of partition assemblies (first partition members 120 and second partition members 130) can be provided within a single open frame 110 in the Y direction (for example, two rows, three rows, etc.) to form the support frame 100, which is also an integral structure. The single-cell batteries 200 are inserted into the sub-spaces of the open frame 110, and the single-cell batteries within the open frame 110 are also distributed in multiple rows in the Y direction. All the multiple rows of first partition members 120 can be provided on the bottom member 113 of the open frame 110. In addition, the first partition members 120 of the first row and the last row in the Y direction can be provided on the first side member 111 of the open frame 110, and the first partition members 120 of the remaining rows can be provided on the bottom member 113 of the open frame 110.

[0055] As Figure 10 shown, in the YZ plane, the outer shape of the first partition member 120 can be an arc structure. Air flows in through one of the fifth opening 1131 and the sixth opening 1132, flows along the outer edge of the first partition member 120, and then flows out through the other of the fifth opening 1131 and the sixth opening 1132, making the air path in a U shape. It can be understood that in some other specific embodiments, as Figure 11 shown, in the YZ plane, the outer shape of the first partition member 120 can also be in a fan shape. Air flows in through one of the fifth opening 1131 and the sixth opening 1132, flows along the outer edge of the first partition member 120, and then flows out through the other of the fifth opening 1131 and the sixth opening 1132, and the air path is also approximately in a U shape. In some other embodiments, as Figure 12 shown, in the YZ plane, the first partition member 120 is composed of a square portion (which is a square or a rectangle) and an arc portion. Air flows along the edge of the first partition member 120, and the air path is in a U shape. In some specific embodiments, when the first partition member 120 is fixedly installed on the bottom member 113, the height of the first partition member 120 in the Z direction does not exceed half of the height of the single-cell battery 200 in the Z direction; when the first partition member 120 is fixed on a first side member 111, the length of the first partition member 120 in the Y direction does not exceed half of the length of the single-cell battery 200 in the Y direction. Since the middle region of the single-cell battery 200 has the largest expansion amount during charge and discharge, air can flow through the middle region of the single-cell battery 200, thereby improving the heat dissipation performance of the battery module.

[0056] In some specific embodiments, the second separator 130 includes a first separator portion 131, a second separator portion 132, and a third separator portion 133. The first separator portion 131 and the second separator portion 132 are disposed opposite to each other. One end of the third separator portion 133 is fixedly connected to the end of the first separator portion 131, and the other end of the third separator is fixedly connected to the end of the second separator portion 132. The second separator 130 is integrally in a door frame structure. When the first separator 120 is fixedly connected to the bottom member 113, the first separator portion 131 of the second separator 130 is fixedly connected to a first side member 111, the second separator portion 132 of the second separator 130 is fixedly connected to another first side member 111, and the third separator portion 133 of the second separator 130 is flush with the top of the opening frame 110. When the first separator 120 is fixedly connected to the first side member 111, the first separator portion 131 of the second separator 130 is fixedly connected to the bottom member 113, the third separator portion 133 of the second separator 130 is fixedly connected to another first side member 111, and the second separator portion 132 of the second separator 130 is flush with the top of the opening frame 110. It can be understood that the second separator 130 only includes the first separator portion 131 and the second separator portion 132. The first separator portion 131 and the second separator portion 132 are disposed opposite to each other. The first separator portion 131 is fixedly connected to a first side member 111, and the second separator portion 132 is fixedly connected to another first side member 111. The first side member 111 and two adjacent first separator portions 131 thereon form a card slot for clamping one side of the single cell 200, and the other first side member 111 and two adjacent first separator portions 131 thereon form a card slot for clamping the other side of the single cell 200.

[0057] In some specific embodiments of the present application, an elastic component 150 is further included. The elastic component 150 is disposed on the second separator 130. Along the first direction, the elastic component 150 extends out of the second separator 130. The elastic component 150 is used to abut against the single cell 200, and the first direction is the stacking direction of the single cell 200.

[0058] Specifically, such as Figures 4 to 7As shown, the elastic component 150 is disposed on the second separator 130. Along the X direction (i.e., the first direction, the stacking direction of the single cells 200), the elastic component 150 extends outwards on both sides of the second separator 130 for abutting against the single cells 200. Since the single cells 200 expand when charging and discharging, in order to ensure the working performance of the single cells 200 and avoid thermal runaway caused by lack of expansion space, along the X direction, the distance between two adjacent second separators 130 is slightly greater than the thickness of the single cell 200 in the X direction, thereby providing a certain expansion space for the single cell 200. However, since the distance between two adjacent second separators 130 is greater than the thickness of the single cell 200, the single cell 200 may shake. To ensure the stability of the single cell 200, the elastic component 150 is disposed on the second separator 130. When the single cell 200 is not expanded, the elastic component 150 abuts against the single cell 200, thereby fixing the single cell 200. When the single cell 200 expands, the single cell 200 compresses the elastic component 150 and thus abuts against the second separator 130. Through the above setting method, a certain expansion space can be provided for the single cell 200, and over-expansion of the single cell 200 can be avoided, thereby improving the stability of the single cell 200.

[0059] In some specific embodiments, as Figure 13 shown, 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 oppositely arranged and have a gap. The first abutting member 151 includes a supporting portion 1511 and a protruding portion 1512. One end of the supporting portion 1511 is fixedly connected to the second separator 130. The supporting portion 1511 and the second separator 130 are in the same plane and extend away from the second separator 130. The end of the supporting portion 1511 is provided with a protruding portion 1512. The protruding portion 1512 extends along the X direction and extends away from the second separator 130 and the second abutting member 152. The structures of the first abutting member 151 and the second abutting member 152 are the same. The abutting portion of the second abutting member 152 extends away from the first abutting member 151. When the single cell 200 does not expand, there is a certain gap between the single cell 200 and the second separator 130. Two adjacent single cells 200 respectively abut against the protruding portion of the first abutting member 151 and the protruding portion of the second abutting member 152. When the single cell 200 expands, two adjacent single cells 200 respectively squeeze the first abutting member 151 and the second abutting member 152. The supporting portions of the first abutting member 151 and the second abutting member 152 undergo elastic deformation, that is, the protruding portions of the first abutting member 151 and the second abutting member 152 approach each other in the X direction, and the single cell 200 can abut against the second separator 130. As Figures 10 to 12As shown, when the second partition 132 is a door-shaped structure, an elastic component 150 is provided at each of the lower ends of the first partition 131 and the second partition 132, and two spaced-apart elastic components 150 are provided below the third partition 133. It can be understood that the elastic components 150 on the first partition 131 and the second partition 132 can also extend in the Y direction, that is, the elastic component 150 on the first partition 131 extends out of the first partition 131 and towards the second partition 132, and the elastic component 150 on the second partition 132 extends out of the second partition 132 and towards the first partition 131. It can be understood that the number of the elastic components 150 on the second partition member 130 can be set according to the size of the single battery 200.

[0060] In some specific embodiments of the present application, the connection between the second partition member 130 and the side member is connected by an arc transition. Specifically, the second partition member 130 is fixedly connected to the first side member 111, and the connection between the second partition member 130 and the first side member 111 is an arc transition. By the above method, the single battery 200 can be better fitted with the opening frame 110 and the second partition member 130, and the stress concentration at the connection between the two can be reduced, improving the structural performance of the battery pack housing.

[0061] In some specific 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 a third opening 560. The second pipe 400 is fixedly connected to the first housing 500 and communicates with the second channel 530 through a fourth opening 570.

[0062] Specifically, as Figure 14As shown, in order to facilitate the introduction of external air into the battery pack housing and the discharge of air inside the battery pack housing, a first duct 300 and a second duct 400 are provided, and the first duct 300 and the second duct 400 guide the air. The orientations of the first duct 300 and the second duct 400 can be set according to actual requirements. The first duct 300 is fixedly connected to the side wall of the first housing 500, and the second duct 400 is fixedly connected to the bottom of the first housing 500. The first duct 300 is an air intake duct, and the second duct 400 is an air exhaust duct. Air enters the first duct 300 and enters the first channel 520 through the third opening 560. The air flow flows in the first channel 520 and enters each third channel 140 through the first opening 540 (and the fifth opening 1131). The air flow flows in the third channel 140 and acts on the surface of the single cell 200, exchanges heat with the single cell 200, takes away the heat of the single cell 200, and then enters the second channel 530 through the second opening 550 (and the sixth opening 1132). The hot air in each third channel 140 converges in the second channel 530 and is then discharged through the fourth opening 570 into the second duct 800. The heat on the surface of the single cell 200 can be taken away during the air flow process, thereby dissipating heat from the internal structure of the battery pack. It can be understood that the first duct 300 can be an air exhaust duct, and the second duct 400 is an air intake duct, and the air flow direction is opposite to the air flow direction when the first duct 300 is an air intake duct. In order to further improve the heat dissipation performance of the battery pack, a fan can be provided on the first duct 300 or the second duct 400. By rotating the fan, the air flow speed can be increased, so that the air can take away more heat of the single cell 200, thereby improving the heat dissipation performance of the battery pack.

[0063] The following describes the battery pack according to the second aspect embodiment, including a plurality of single cells and a battery pack housing.

[0064] Specifically, the battery pack is assembled in the following manner. First, the support frame 100 and the first housing 500 are installed to form a lower housing structure. When there are multiple support frames 100 in the first housing 500, the multiple support frames 100 can be respectively fixed to the first housing 500. For a structure where the multiple support frames 100 have no spacing in the Y direction, the multiple support frames 100 can be set as an integral structure, and then the integral support frame is installed on the first housing 500. After the lower housing is assembled, the single cells 200 are sequentially inserted into the sub-spaces of the support frame 100, and then the BMS and the BDU 700 are installed in the lower housing. Then, the second housing 600 is buckled on the first housing 500, thereby completing the encapsulation of the battery pack. The battery pack with the above structure can further simplify the assembly process, reduce the setting of related components during the assembly process, improve the assembly efficiency and save costs.

[0065] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. Battery pack housing for accommodating a support frame, the support frame being used to support a plurality of single cells, characterized in that, including, a first housing having a receiving cavity, a first channel, a second channel, a first opening, a second opening, a third opening, and a fourth opening, wherein the receiving cavity is configured to receive the support frame, the first channel and the receiving cavity communicate through the first opening, the second channel and the receiving cavity communicate through the second opening, the first channel communicates with the exterior of the first housing through the third opening, the second channel communicates with the exterior of the first housing through the fourth opening, the first housing includes a first bottom plate and a second bottom plate, and both the first channel and the second channel are located between the first bottom plate and the second bottom plate; a support frame configured to receive a plurality of single cells, the support frame including an open frame and a partitioning assembly, the open frame having a fifth opening and a sixth opening, the partitioning assembly including a first partitioning member and a second partitioning member, the first partitioning member being fixedly connected to the bottom member of the open frame, both the first partitioning member and the second partitioning member being fixedly connected to the open frame, the first partitioning member and the second partitioning member defining a third channel, and a plurality of the partitioning assemblies being spaced apart along a first direction and configured to partition adjacent single cells; the fifth opening and the sixth opening being located on both sides of the first partitioning member; the support frame is fixedly connected to the first housing, the fifth opening is correspondingly arranged with the first opening, the sixth opening is correspondingly arranged with the second opening, after air flow enters the first channel through the third opening, it enters the third channel through the first opening and the fifth opening, flows in the third channel, and then enters the second channel through the sixth opening and the second opening, and is discharged through the fourth opening.

2. The battery pack housing according to claim 1, characterized in that, the second partitioning member includes a first partitioning portion, a second partitioning portion, and a third partitioning portion, the first partitioning portion and the second partitioning portion being oppositely arranged, and two ends of the third partitioning portion being fixedly connected to the first partitioning portion and the second partitioning portion respectively.

3. The battery pack housing according to claim 1, characterized in that, further including an elastic assembly disposed on the second partitioning member, along the first direction, the elastic assembly extends out of the second partitioning member and is configured to abut against the single cell, wherein the first direction is the stacking direction of the single cells.

4. The battery pack housing according to claim 3, characterized in that, the elastic assembly includes a first abutting member and a second abutting member, the first abutting member and the second abutting member being oppositely arranged and having a gap therebetween, and the first abutting member and the second abutting member can approach each other under the action of the expansion of the single cell.

5. The battery pack housing according to claim 1, characterized in that, further including, a first pipe fixedly connected to the first housing and communicating with the first channel through the third opening; a second pipe fixedly connected to the first housing and communicating with the second channel through the fourth opening.

6. The battery pack housing according to claim 5, characterized in that, further including a fan disposed in the first pipe or the second pipe.

7. Battery pack, characterized in that, including a plurality of single cells and the battery pack housing according to any one of claims 2 to 6.

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