CN113782897A

CN113782897A - Battery pack and vehicle with same

Info

Publication number: CN113782897A
Application number: CN202010442932.7A
Authority: CN
Inventors: 许教练; 王洪斌; 黄尧钦; 朱燕
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-12-10
Anticipated expiration: 2040-05-22
Also published as: CN113782897B

Abstract

A battery pack and a vehicle with the battery pack are provided, the battery pack comprises a box body and an electric core arranged in the box body, the box body comprises a first plate body, a second plate body, a first side plate, a second side plate, one or more intermediate baffles and a structural beam which are extruded integrally, a first cooling channel and a second cooling channel are extruded out of the first plate body and the second plate body simultaneously, make first plate body and second plate body can directly regard as thermal management part, simple process saves redundant structure, intermediate bottom divides the accommodation space in the box into a plurality of subspaces, a plurality of structure roof beams support between first plate body and intermediate bottom, second plate body and intermediate bottom or the double-phase adjacent intermediate bottom, form firm I shape structure and separate each subspaces and form a plurality of chambeies that hold of electric core, can expand according to the demand multilayer, the suitability is high, and guarantee holistic structural strength. The vehicle with the battery pack reduces redundant parts and further realizes the light weight of the vehicle.

Description

Battery pack and vehicle with same

Technical Field

The present disclosure relates to the field of batteries, and more particularly, to a battery pack and a vehicle having the same.

Background

With the continuous popularization of new energy automobiles, the use requirement of power batteries in the new energy automobiles becomes higher and higher. The conventional battery pack adopts a form that the battery module is mounted in a battery pack case to form a battery pack structure. The battery pack mainly comprises a tray, a thermal management system, a module, single batteries, a connecting piece, a flame-retardant partition plate, a sealing ring, a heat insulation plate, a sealing cover plate and other structural components, and is multiple in parts, complex in product structure, low in space utilization rate and high in production and operation cost. What most battery package adopted at present is that the battery module assembles on the battery package box, form the battery package structure, and the battery module includes battery cell and is used for fixed battery cell's structure, battery cell includes utmost point core and holds utmost point core and electrolyte or fixed electrolyte's battery case, the equipment that will lead to the battery package is more loaded down with trivial details like this, the cost is higher, the quantity of the structure in the battery package is more relatively moreover, thereby lead to the weight increase of battery package, and reduced the space utilization of battery package.

In addition, the adaptability of battery package is poor, and inconvenient extension needs redesign to different motorcycle types.

Disclosure of Invention

In view of this, the present disclosure aims to solve the technical problems of the prior art, such as many parts of a battery pack, complicated assembly, and poor adaptability.

On the one hand, this disclosure provides a battery package, include the box and be located electric core in the box, the box includes:

the cooling structure comprises a first plate body and a second plate body, wherein the first plate body and the second plate body are oppositely arranged along a first direction, a first cooling channel penetrates through the first plate body along a second direction, and the first direction is vertical to the second direction;

a manifold assembly in communication with the first cooling passage;

the first side plate and the second side plate are matched with the first plate body and the second plate body to form an accommodating space, and a first opening and a second opening are formed at two ends of the box body along the second direction;

the partition assembly comprises a middle partition plate and a structural beam, the middle partition plate is arranged between the first plate body and the second plate body, the middle partition plate is connected with the first side plate and the second side plate, the structural beam and the middle partition plate divide the accommodating space into a plurality of accommodating cavities, and at least one accommodating cavity is internally provided with at least one battery cell; and

the installation department, the installation department is used for being fixed with external connection.

In an embodiment, the first plate body is provided with a plurality of first cooling channels arranged along a third direction, the third direction is different from the first direction and the second direction, and the confluence assembly comprises two first confluence pipes, wherein one first confluence pipe is communicated with one ends of the plurality of first cooling channels, and the other first confluence pipe is communicated with the other ends of the plurality of first cooling channels, so that the plurality of first cooling channels are communicated.

In one embodiment, one of the first collecting pipes has a first inlet for guiding the refrigerant, and the other of the first collecting pipes has a first outlet for guiding the refrigerant.

In an embodiment, the first cooling channel is integrally formed with the first plate body.

In one embodiment, the first cooling channel is integrally extruded from the first plate body.

In an embodiment, two ends of the first board body along the second direction protrude from the structural beam, the first side board, the second side board and the middle partition board.

In an embodiment, the confluence assembly includes two first collecting pipes, each of the first collecting pipes is provided with a first flow guiding interface, and the two first collecting pipes are sleeved at two ends of the first plate body along the second direction through the first flow guiding interfaces so as to enable the first cooling channel to be communicated with the first collecting pipes.

In an embodiment, first steps are formed at both ends of the first plate body along the second direction, so that a first step surface and a second step surface are formed at both ends of the first plate body along the second direction;

at the same end of the box body along the second direction, the first step surface is closer to the accommodating cavity than the second step surface, and the first step surface is flush with the end surfaces of the first side plate and the second side plate along the second direction;

the first plate body is followed the both ends protrusion in of second direction in first step face forms first collecting pipe installation department, first collecting pipe installation department is followed the terminal surface of second direction does the second step face, first cooling channel's opening is seted up in the second step face.

In an embodiment, an end surface of the second plate body in the second direction is flush with the first step surface.

In an embodiment, a second cooling channel is disposed through the second plate body along the second direction, and the confluence assembly is communicated with the second cooling channel.

In an embodiment, the second plate body is provided with a plurality of second cooling channels arranged at intervals in a third direction, the third direction is different from the first direction and the second direction, the confluence assembly comprises two second confluence pipes, one of the second confluence pipes is communicated with one ends of the plurality of second cooling channels, and the other second confluence pipe is communicated with the other ends of the plurality of first cooling channels, so that the plurality of second cooling channels are communicated.

In one embodiment, one of the second manifold pipes has a second inlet for guiding the refrigerant, and the other of the second manifold pipes has a second outlet for guiding the refrigerant.

In an embodiment, the second cooling channel is integrally formed with the second plate body.

In one embodiment, the second cooling channel is integrally extruded from the second plate body.

In an embodiment, two ends of the second board body along the second direction protrude from the middle partition board, the structural beam, the first side board and the second side board.

In an embodiment, the confluence assembly includes two second confluence pipes, the second confluence pipes are provided with second flow guide interfaces, and the two second confluence pipes are sleeved at two ends of the second plate body along the second direction through the second flow guide interfaces so as to enable the second cooling channel to be communicated with the second confluence pipes.

In an embodiment, two ends of the second plate body along the second direction are both provided with a second step, so that two ends of the second plate body along the second direction are both provided with a third step surface and a fourth step surface;

at the same end of the box body along the second direction, the third step surface is closer to the accommodating cavity than the fourth step surface, the end surfaces of the first side plate and the second side plate along the second direction are protruded out of the structural beam and the middle partition plate, and the third step surface is flush with the end surfaces of the first side plate and the second side plate along the second direction;

the second plate body is followed the both ends protrusion in of second direction in third step face forms the second collecting pipe installation department, the second collecting pipe installation department is followed the terminal surface of second direction does the second step face, second cooling channel's opening is seted up in the second step face.

In an embodiment, the first side plate and the second side plate are respectively disposed on two sides of the box body along a third direction, and the third direction is different from the first direction and the second direction.

In one embodiment, the first board body, the second board body, the first side board and the second side board are integrally formed.

In an embodiment, the first board body, the second board body, the first side board and the second side board are extruded integrally.

In an embodiment, the mounting portion is disposed on the first side plate and/or the second side plate.

In one embodiment, the intermediate partition is parallel to the first plate body.

In one embodiment, the first side plate, the second side plate and the middle partition plate are integrally formed.

In one embodiment, the intermediate partition is extruded integrally with the first side plate and the second side plate.

In one embodiment, the battery pack includes a first cover plate covering the first opening and a second cover plate covering the second opening.

In one embodiment, the middle partition divides the accommodating space into a first sub-accommodating space between the first plate and the middle partition and a second sub-accommodating space between the second plate and the middle partition, and the box body is provided with a plurality of structural beams extending along the second direction;

the plurality of structural beams are positioned in the first sub-accommodating space and are connected with the first plate body and the middle partition plate; or

The plurality of structural beams are positioned in the second sub-containing space and are connected with the second plate body and the middle partition plate; or

The plurality of structural beams are distributed in the first sub-containing space and the second sub-containing space, the structural beam located in the first sub-containing space is connected with the first plate body and the middle partition plate, and the structural beam located in the second containing space is connected with the second plate body and the middle partition plate.

In an embodiment, the first cover plate is hermetically connected to one end of the first plate body, the second plate body, the first side plate, the second side plate, the intermediate partition plate and the structural beam along the second direction, and the second cover plate is hermetically connected to the other end of the first plate body, the second plate body, the first side plate, the second side plate, the intermediate partition plate and the structural beam along the second direction, so that each of the accommodating cavities forms a sealed cavity.

In an embodiment, the first cover plate comprises a first sub-cover plate and a second sub-cover plate, the first sub-cover plate is hermetically connected with the first plate body, the first side plate, the second side plate, the middle partition plate and the structural beam located in the first sub-accommodating space, and the second sub-cover plate is hermetically connected with the second plate body, the first side plate, the second side plate, the middle partition plate and the structural beam located in the second sub-accommodating space;

the second cover plate comprises a third sub-cover plate and a fourth sub-cover plate, the third sub-cover plate is connected with the first plate body, the first side plate, the second side plate, the middle partition plate and the structural beam located in the first sub-containing space in a sealing mode, and the fourth sub-cover plate is connected with the second plate body, the first side plate, the second side plate, the middle partition plate and the structural beam located in the second sub-containing space in a sealing mode.

In an embodiment, the partition assembly includes a plurality of intermediate partitions, the plurality of intermediate partitions partition the accommodating space into a first sub-accommodating space between the first plate and the intermediate partition, a second sub-accommodating space between the second plate and the intermediate partition, and a third sub-accommodating space between adjacent intermediate partitions, the box body is provided with a plurality of structural beams, and the structural beams extend along the second direction;

The plurality of structural beams are positioned in the third sub-accommodating space and are connected with the two adjacent middle clapboards; or

The structure beams are distributed in the first sub-containing space, the second sub-containing space and the third sub-space, the structure beam located in the first sub-containing space is connected with the first plate body and the middle partition plate, the structure beam located in the second containing space is connected with the second plate body and the middle partition plate, and the structure beam located in the third sub-space is connected with two adjacent middle partition plates.

In one embodiment, the first cover plate comprises a first sub-cover plate, a second sub-cover plate and a first intermediate sub-cover plate, the first sub-cover plate is hermetically connected with the first plate body, the first side plate, the second side plate, the intermediate partition plate and the structural beam located in the first sub-accommodation space, the second sub-cover plate is hermetically connected with the second plate body, the first side plate, the second side plate, the intermediate partition plate and the structural beam located in the second sub-accommodation space, and the first intermediate sub-cover plate is hermetically connected with the first side plate, the second side plate, two adjacent intermediate partition plates and the structural beam located in the third sub-accommodation space;

the second cover plate comprises a third sub-cover plate, a fourth sub-cover plate and a second middle sub-cover plate, the third sub-cover plate is connected with the first plate body, the first side plate, the second side plate, the middle partition plate and the structural beam in the first sub-containing space in a sealing mode, the fourth sub-cover plate is connected with the second plate body, the first side plate, the second side plate, the middle partition plate and the structural beam in the second sub-containing space in a sealing mode, and the second middle sub-cover plate is connected with the first side plate, the second side plate, the two adjacent middle partition plates and the structural beam in the third sub-containing space in a sealing mode.

In one embodiment, the first plate body, the second plate body, the middle partition plate and the structural beam are integrally formed.

In an embodiment, a heat-conducting structural adhesive is filled between the battery cell and the first plate body, the second plate body, the structural beam, and the intermediate partition plate.

In another aspect, the present disclosure is directed to a vehicle including a vehicle body and the battery pack described above, the battery pack being mounted to the vehicle body through the mounting portion.

In summary, the present disclosure provides a battery pack and a vehicle having the battery pack, the battery pack includes a box body and a battery cell disposed in the box body, the box body includes a first plate body, a second plate body, a first side plate, a second side plate, a middle partition plate, and a structural beam, the first plate body and the second plate body extrude a first cooling channel and a second cooling channel simultaneously, so that the first plate body and the second plate body can be directly used as heat management parts, the process is simple, the redundant structure is saved, one or more intermediate partition plates can be used, the intermediate partition plates divide the accommodating space in the box body into a plurality of sub-accommodating spaces, can set up a plurality of intermediate bottom according to the demand and carry out the multilayer and expand in order to adapt to different demands, a plurality of structure roof beams support between first plate body and intermediate bottom, second plate body and intermediate bottom or two adjacent intermediate bottom, form firm I shape structure and separate each sub-accommodation space and form a plurality of chambeies that hold of holding electric core. The whole structural strength of the battery pack is guaranteed, and the battery core is convenient to install in the box body. The vehicle with the battery pack reduces redundant parts and further realizes the light weight of the vehicle.

Drawings

The above and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a battery pack in one embodiment;

fig. 2 is a top view of the battery pack of fig. 1;

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

FIG. 4 is a schematic view of the assembly of the bus bar assembly and the case of the battery pack shown in FIG. 1;

fig. 5 is a side view of the battery pack shown in fig. 4;

FIG. 6 is a cross-sectional view taken along D-D of FIG. 5;

fig. 7 is a schematic structural view of a battery pack in another preferred embodiment.

Reference numerals:

a battery pack 99;

the cooling structure comprises a box body 10, a containing cavity 101, a first plate body 11, a first cooling channel 111, a first step surface 113, a second step surface 114, a first manifold mounting portion 117, a second plate body 12, a second cooling channel 121, a third step surface 123, a fourth step surface 124, a second manifold mounting portion 127, a first manifold 131, a first inlet 1311, a first outlet 1312, a first diversion port 1315, a manifold joint 135, a second manifold 132, a second inlet 1321, a second outlet 1322, a second diversion port 1325, a first side plate 14, a second side plate 15, a first cover plate 16, a first sub-cover plate 161, a second sub-cover plate 162, a second cover plate 17, a third sub-cover plate 171, a fourth sub-cover plate 172, an intermediate partition 181, a structural beam 182 and a mounting portion 19;

the battery cell comprises a battery cell 20, a first pole 21, a second pole 22 and a first general connecting terminal 27;

an inner connecting sheet 31 and an interlayer connecting member 32.

Detailed Description

Reference will now be made in detail to the embodiments of the present disclosure, 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 functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present disclosure, and should not be construed as limiting the present disclosure.

In the description of the present disclosure, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure.

Before the embodiments are described in detail, it is to be understood that this disclosure is not limited to the particular arrangements or instrumentality described below or illustrated in the drawings. The present disclosure is capable of embodiments in other ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," "having," and the like, herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. In particular, when "a certain element" is described, the present disclosure does not limit the number of the element to one, and may include a plurality of the elements.

For convenience of description, referring to directions X1, X2 and X3, referring to fig. 1 to 6, the present invention provides a battery pack 99, which includes a case 10 and a plurality of battery cells 20 disposed in the case 10, wherein the case 10 is mounted on a vehicle with the battery cells 20 mounted thereon, and the plurality of battery cells 20 are connected in series and parallel to provide power for the vehicle. It should be understood that the battery pack 99 includes a plurality of cells 20 connected in series and parallel only as an embodiment of the present invention, and in other embodiments, the battery pack 99 may also be provided with only one cell 20 as long as the vehicle can be powered, and the present invention is not limited thereto.

As shown in fig. 1 to 3, the box 10 includes a first board 11, a second board 12, a junction block (not numbered), a first side plate 14, a second side plate 15, a partition block (not numbered), and a mounting portion 19.

First plate body 11 and second plate body 12 set up along first direction X1 relatively, first plate body 11 runs through along second direction X2 and is provided with first cooling channel 111, first direction X1 is perpendicular with second direction X2, make the both ends of first cooling channel 111 form the opening on first plate body 11 along the terminal surface of second direction X2, the leading-in refrigerant of one end opening through first cooling channel 111, and derive the refrigerant by the other end opening of first cooling channel 111, the refrigerant flows in first cooling channel 111 and can take away the heat that produces when electric core 20 charges and discharges, thereby realize cooling electric core 20, guarantee the charge and discharge efficiency and the safety of electric core 20.

The confluence assembly is communicated with the first cooling channel 111, and the confluence assembly can be communicated with the refrigerant storage device, so that the refrigerant is guided into and out of the first cooling channel 111.

The first side plate 14 and the second side plate 15 cooperate with the first plate 11 and the second plate 12 to form an accommodating space, a first opening and a second opening are formed at two ends of the box body 10 along the second direction X2, and the first plate 11, the second plate 12, the first side plate 13 and the second side plate 14 enclose and close to form an accommodating space. It should be understood that "the first side plate 14 and the second side plate 15 cooperate with the first board 11 and the second board 12" means that the first side plate 14 and the second side plate 15 contact with the first board 11 and the second board 12 to enclose the accommodating space, the first side plate 14 and the second side plate 15 may support the first board 11 and the second board 12, or the first board 11 and the second board 12 may be supported only by the structural beam 18, and the first side plate 14 and the second side plate 15 only abut against the first board 11 and the second board 12 to enclose the accommodating space, which is not limited in this respect.

The partition assembly comprises a middle partition board 181 and a structural beam 182 which are arranged between the first board body 11 and the second board body 12, the middle partition board 181 is jointed with the first side board 14 and the second side board 15, a certain included angle is formed between the structural beam 182 and the middle partition board 181, and the structural beam 182 is jointed with the middle partition board 181 and the first board body 11, so that the first board body 11, the middle partition board 181 and the structural beam 182 form an I-beam structure, and the three form a stable structure; or the structural beam 182 is connected with the middle partition board 181 and the second plate body 12, the middle partition board 181 and the structural beam 182 form an i-beam structure, which forms a stable structure. It should be understood that "joined" is defined as two components being integrally formed, or the two components being connected together by other connecting structures, such as welding, gluing, riveting, bolting, etc., for example, that "the middle partition 181 is joined to the first side plate 14 and the second side plate 15" includes that the middle partition 181 is integrally formed with the first side plate 14 and the second side plate 15, or that the middle partition 181 is connected to the first side plate 14 and the second side plate 15 by other connecting structures.

Structure roof beam 182 and intermediate bottom 181 separate into a plurality of chambeies 101 that hold with the accommodation space, form and hold chamber 101 and be convenient for pack electric core 20 into box 10 in, at least one holds the intracavity 101 and is equipped with at least one electric core 20, and intermediate bottom 181 and structure roof beam 182 carry on spacingly to electric core 20, prevent electric core 20 drunkenness and the damage that causes, further promoted electric core 20's safety and stability.

In the prior art, the battery module is required to be formed by the battery cells, then the battery module is mounted on the tray to form a battery pack, and the tray bears the battery module to be mounted on the vehicle. In the present invention, the case 10 is directly provided with the fixing and mounting portion 19, such as the lifting lug shown in fig. 1, for connecting with the outside, so that the case 10 can be directly mounted on the vehicle floor, thereby saving a heavy tray and improving the energy density of the battery pack 99.

In one embodiment, the first plate body 11 is provided with a plurality of first cooling passages 111 arranged along a third direction X3, the third direction X3 is different from the first direction X1 and the second direction X2, and the plurality of first cooling passages 111 respectively form a plurality of openings on an end surface of the first plate body 11 along the second direction X2. The collecting assembly comprises two first collecting pipes 131, the first collecting pipes 131 are provided with communication channels 133, wherein the communication channels 133 of one first collecting pipe 131 are communicated with openings at one ends of the plurality of first cooling channels 111, so that the communication between the first collecting pipe 131 and one ends of the plurality of first cooling channels 111 is realized; the communication passage 133 of the other first manifold 131 communicates with the openings of the other ends of the plurality of first cooling passages 111, thereby achieving communication of the first manifold 131 with the other ends of the plurality of first cooling passages 111. The two first collecting pipes 131 are respectively communicated with both ends of the plurality of first cooling passages 111, thereby realizing communication of the plurality of first cooling passages 111. The refrigerant is guided into one of the first collecting pipes 131, and the refrigerant is guided out of the other first collecting pipe 131, so that the first plate 11 has an effect of cooling the battery cell 20.

More specifically, a first manifold 131 is provided with a first inlet 1311 for introducing the refrigerant, and the first manifold 131 is connected to the refrigerant storage device through the first inlet 1311, so that the refrigerant in the refrigerant storage device can be introduced into the communication channel 133 of the first manifold 131; the other first collecting pipe 131 is provided with a first outlet 1312 for leading out the refrigerant, and the first collecting pipe 131 is connected with the refrigerant storage device through the first outlet 1312, so that the refrigerant in the communication channel 133 of the first collecting pipe 131 can be led out to the refrigerant storage device for recycling. The refrigerant is led in through the first inlet 1311 and led out through the first outlet 1312 to circulate in the first cooling channel 111, and the heat of the battery cell 20 is taken away, so that the battery cell 20 is cooled.

In the illustrated embodiment, the first inlet 1311 and the first outlet 1312 are respectively disposed at ends of the two first collecting pipes 131 to facilitate connection with the refrigerant storage device.

Preferably, the first inlet 1311 and the first outlet 1312 are fitted with a manifold joint 135, and the manifold joint 135 facilitates connection with a pipe for communication to a refrigerant storage device.

In one embodiment, the first cooling channel 111 is integrally formed with the first plate 11, which may be implemented by casting, stamping, 3D printing (i.e., additive manufacturing), and the like, and the first cooling channel 111 is integrally formed with the first plate 11, which can improve the structural strength of the first plate 11 and enable the first cooling channel 111 to have excellent sealing performance. Preferably, the third direction X3 is perpendicular to the first direction X1 and the second direction X2, and the first cooling channel 111 is integrally formed by extruding the first plate body 11, so that the manufacturing process is simple, and the production efficiency is improved.

The battery pack 99 includes a first cover 16 covering the first opening and a second cover 17 covering the second opening. It should be understood that "cover" means to cover the opening, the cover structure is in contact with the frame structure forming the opening, and the cover structure can be partially or completely connected with the frame structure in a sealing manner, for example, the first cover 16 covers the first opening, that is, the first cover 16 covers the first opening, and the first cover 16 can be partially or completely connected with the box 10 in a sealing manner, so that the accommodating space is a sealed space. In the present embodiment, the middle partition 181 and the structural beam 182 do not protrude from the first side plate 14 and the second side plate 15 along the second direction X2, that is, the end surfaces of the middle partition 181, the structural beam 182, the first side plate 14 and the second side plate along the second direction X2 are flush, the projections of the middle partition 181, the structural beam 182, the first side plate 14 and the second side plate on the second direction X2 completely coincide, and the first side plate 14 and the second side plate 15 protrude from the middle partition 181 and the structural beam 182 along the second direction X2, the length of the projection of the first side plate 14 and the second side plate 15 on the second direction X2 is greater than that of the middle partition 181 and the structural beam 182, so that the first cover 16 and the second cover 17 can be connected with the first side plate 14 and the second side plate 15 without being affected by the middle partition 181 and the structural beam 182, the first cover 16 and the second cover 17 are welded with the first side plate 14 and the second side plate 15, and the first cover 16, the second cover 17 is welded on the first cover 16, The second cover plate 17 is connected to the first plate 11 and the second plate 12 by structural adhesive, so that the first opening and the second opening are covered by the first cover plate 16 and the second cover plate 17. It should be understood that this is only an embodiment of the present invention, in other embodiments, the first cover plate 16 and the second cover plate 17 may also be connected to the first side plate 14 and the second side plate 15 by other means, for example, by structural adhesive, bolt connection, etc., the first cover plate 16 and the second cover plate 17 may also be connected to the first plate 11 and the second plate 12 by seam welding, etc., and the present invention does not limit the connection manner of the first cover plate 16 and the second cover plate 17 to the first plate 11, the second plate 12, the first side plate 14, and the second side plate 15, as long as the first cover plate 16 and the second cover plate 17 can cover the first opening and the second opening.

In order to form a sealed space in the accommodating space, the first cover plate 16 and the second cover plate 17 are welded to the end surfaces of the first side plate 14 and the second side plate 15 along the second direction, and the joint of the first cover plate 16 and the second cover plate 17 with the first plate 11 and the second plate 12 is filled with sealing glue, so that a sealed accommodating space is formed in the box body 10. However, this is only one embodiment of the present invention, and in other embodiments, the end surfaces of the first panel 11, the second panel 12, the first side panel 14, and the second side panel 15 along the second direction X2 are flush, positions where the first cover plate 16 and the second cover plate 17 are welded are reserved on the first panel 11 and the second panel 12, and the first cover plate 16 and the second cover plate 17 are directly welded to the first panel 11, the second panel 12, the first side panel 14, and the second side panel 15 to realize a sealed accommodating space.

The first collecting pipe 131 can communicate the communication channel 133 with the first cooling channel 111 in various ways, for example, the first collecting pipe 131 is provided with a plurality of flow guiding plugs corresponding to the openings of the first cooling channel 111, and the communication channel 133 of the first collecting pipe 131 is communicated with the first cooling channel 111 by inserting the plurality of flow guiding plugs into the openings of the first cooling channel 111, respectively.

As shown in fig. 4 to 6, both ends of the first plate body 11 in the second direction X2 protrude from the structural beams 182, the first side plate 14, the second side plate 15, and the intermediate partition plate 181, so that the first manifold pipes 131 can be mounted to the first plate body 11 to connect the communication passages 133 with the first cooling passages 111, and more various mounting manners of the first manifold pipes 131 can be adapted.

Preferably, the first collecting pipes 131 are provided with first flow guiding connectors 1315, the size of the first flow guiding connectors 1315 is equivalent to that of the end surfaces of the first plate bodies 11 along the second direction X2, and the two first collecting pipes 131 are sleeved at the two ends of the first plate bodies 11 along the second direction X2 through the first flow guiding connectors 1315 so that the first cooling channels 111 are communicated with the first collecting pipes 131. The first collecting pipe 131 can be sleeved on the first flow guide interface 1315 of the first plate body 11 through the arrangement, the structure is simple, and a plurality of flow guide plugs are not required to be arranged.

Further, the first collecting pipe 131 is connected to the first board body 11 in a sealing manner, and the first collecting pipe 131 is connected to the first board body 11 in a sealing manner by filling sealant at the joint of the first collecting pipe 131 and the first board body 11, so that the refrigerant is prevented from leaking from the joint of the first collecting pipe 131 and the first board body 11.

In order to facilitate the connection of the first cover plate 16 and the second cover 17 with the container body 10, in the illustrated embodiment, both ends of the first plate body 11 along the second direction X2 are provided with first steps formed by removing parts or partially protruding parts of the ends of the first plate body 11 along the second direction X2, so that each end of the first plate body 11 along the second direction forms two end surfaces, namely, a first step surface 113 and a second step surface 114, in other words, the first step forms the first step surface 113 and the second step surface 114 along the second direction X2. At the same end of the case 10 in the second direction X2, the first step surface 113 is disposed closer to the receiving cavity than the second step surface 114. The first opening and the second opening are formed by enclosing the first plate body 11, the second plate body 12, the first side plate 14 and the second side plate 15, in order to enable the first cover plate 16 and the second cover plate 17 to better cover the first opening and the second opening, the first step surface 113 is flush with the end surfaces of the first side plate 15, the second side plate 16 and the second plate body 12 along the second direction X2, and the first opening and the second opening can be covered by welding the first cover plate 16 and the second cover plate 17 with the first step surface 113, the first side plate 15, the second side plate 16 and the second plate body 12.

It should be understood that "the first step surface 113 is flush with the end surfaces of the first side plate 15, the second side plate 16 and the second plate body 12 along the second direction X2" is only an embodiment of the present invention, and in other embodiments, the end surface of the second plate body 12 along the second direction X2 may not be flush with the first step surface 113, for example, the end surface of the second plate body 12 along the second direction X2 protrudes in the second direction X2 compared with the first step surface 113, and the connection may be achieved by seam welding, filling structural adhesive, and the like at the connection positions of the first cover plate 16, the second cover plate 17 and the second plate body 12.

Two ends of the first plate body 11 along the second direction X2 protrude from the first step surface 113 to form a first manifold mounting portion 117, an end surface of the first manifold mounting portion 117 along the second direction X2 is a second step surface 114, an opening of the first cooling channel 111 is opened in the second step surface 114, and the first manifold 131 is sleeved on the first manifold mounting portion 117 through the first flow guide interface 1315.

In order to enhance the cooling effect of the battery pack 99, a cooling channel is provided in the second plate 12 to cool the battery cells 20 in both surfaces in the first direction X1.

Similarly, the second plate body 12 is provided with a second cooling passage 121 extending therethrough in the second direction X2, the plurality of second cooling passages 121 are arranged in a third direction X3, the third direction X3 is different from the first direction X1 and the second direction X2, and the plurality of second cooling passages 121 respectively form a plurality of openings in the end surface of the second plate body 12 in the second direction X2. The bus bar assembly comprises two second bus bars 132, the second bus bars 132 are provided with communication channels 133, wherein the communication channel 133 of one second bus bar 132 is communicated with the openings of one ends of the plurality of second cooling channels 121, so that the communication between the second bus bar 132 and one ends of the plurality of second cooling channels 121 is realized; the communication passage 133 of the other second manifold 132 communicates with the openings of the other ends of the plurality of second cooling passages 121, thereby achieving communication of the second manifold 132 with the other ends of the plurality of second cooling passages 121. The two second collecting pipes 132 are respectively communicated with both ends of the plurality of second cooling passages 121, thereby achieving communication of the plurality of second cooling passages 121. The coolant is guided into one second collecting pipe 132, and the coolant is guided out of the other second collecting pipe 132, so that the second plate 12 has an effect of cooling the battery cell 20.

More specifically, a second collecting pipe 132 is provided with a second inlet 1321 for introducing the refrigerant, and the second collecting pipe 132 is connected to the refrigerant storage device through the second inlet 1321, so that the refrigerant in the refrigerant storage device can be introduced into the communicating channel 133 of the second collecting pipe 132; the other second collecting pipe 132 is provided with a second outlet 1322 for guiding out the refrigerant, and the second collecting pipe 132 is connected with the refrigerant storage device through the second outlet 1322, so that the refrigerant in the communication channel 133 of the second collecting pipe 132 can be guided out to the refrigerant storage device for recycling. The refrigerant is led in through the second inlet 1321 and led out through the second outlet 1322 to circulate in the second cooling channel 121, so as to take away heat of the battery cell 20, thereby achieving the purpose of cooling the battery cell 20.

In the illustrated embodiment, the second inlet 1321 and the second outlet 1322 are respectively disposed at ends of the two second collecting pipes 132, so as to be connected to the refrigerant storage device.

Preferably, the second inlet 1321 and the second outlet 1322 mount a manifold joint 135, the manifold joint 135 facilitating connection with tubing for communication to a refrigerant storage device.

In one embodiment, the second cooling channel 121 is integrally formed with the second plate body 12, which may be implemented by casting, stamping, 3D printing (i.e., additive manufacturing), and the like, and the second cooling channel 121 is integrally formed with the second plate body 12, which can improve the structural strength of the second plate body 12 and enable the first cooling channel 121 to have excellent sealing performance. Preferably, the third direction X3 is perpendicular to the first direction X1 and the second direction X2, and the second cooling channel 121 is integrally formed by extruding the second plate body 12, so that the manufacturing process is simple, and the production efficiency is improved.

The second collecting pipe 132 may communicate the communicating channel 133 with the second cooling channel 121 in various ways, for example, the second collecting pipe 132 is provided with a plurality of flow guiding plugs corresponding to openings of the second cooling channel 121, and the communicating channel 133 of the second collecting pipe 132 communicates with the second cooling channel 121 by inserting the plurality of flow guiding plugs into the openings of the second cooling channel 121, respectively.

In the illustrated embodiment, both ends of the second plate body 12 in the second direction X2 protrude from the intermediate partition 181, the structural beam 182, the first side plate 14, and the second side plate 15, so that the second manifold pipe 132 is mounted to the second plate body 12 to communicate the communication passage 133 with the second cooling passage 121, and a wider variety of mounting manners of the second manifold pipe 132 are adapted.

Preferably, the second collecting pipe 132 is provided with a second flow guiding interface 1325, the size of the second flow guiding interface 1325 is equivalent to the end surface of the second plate body 12 along the second direction X2, and the two second collecting pipes 132 are sleeved at the two ends of the second plate body 12 along the second direction X2 through the second flow guiding interface 1325 so as to communicate the second cooling channel 121 with the second collecting pipes 132. The second collecting pipe 132 can be sleeved on the second flow guiding interface 1325 of the second plate body 12 through the arrangement, the structure is simple, and a plurality of flow guiding plugs are not required to be arranged.

Further, the second collecting pipe 132 is connected with the second plate body 12 in a sealing manner, and the sealant can be filled at the joint of the second collecting pipe 132 and the second plate body 12 to realize the sealing connection of the second collecting pipe 132 and the second plate body 12, so that the refrigerant is prevented from leaking from the joint of the second collecting pipe 132 and the first plate body 12.

In order to facilitate the connection of the first cover plate 16 and the second cover 17 with the container body 10, in the illustrated embodiment, both ends of the second plate body 12 along the second direction X2 are provided with second steps formed by removing parts or partially protruding parts of the ends of the second plate body 12 along the second direction X2, so that each end of the second plate body 12 along the second direction forms two end surfaces, namely, a third step surface 123 and a fourth step surface 124, in other words, the second step forms the third step surface 123 and the fourth step surface 124 along the second direction X2. At the same end of the case 10 in the second direction X2, the third step surface 123 is disposed closer to the receiving cavity than the fourth step surface 124. The first opening and the second opening are formed by enclosing the first plate body 11, the second plate body 12, the first side plate 14 and the second side plate 15, and in order to enable the first cover plate 16 and the second cover plate 17 to better cover the first opening and the second opening, the third step surface 123 is flush with the first side plate 15, the second side plate 16 and the first step surface 113, that is, the first opening and the second opening can be covered by welding the first cover plate 16 and the second cover plate 17 with the first step surface 113, the third step surface 123, the first side plate 15 and the second side plate 16.

It should be understood that "the third step surface 113 is flush with the first side plate 15, the second side plate 16 and the first step surface 113" is only an embodiment of the present invention, and in other embodiments, the third step surface 123 may not be flush with the first step surface 113, for example, the first step surface 113 protrudes in the second direction X2 compared with the third step surface 123, and the connection may be achieved by seam welding, filling structural adhesive and the like at the connection positions of the first cover plate 16 and the second cover plate 17 and the first plate body 11.

Two ends of the second plate body 12 along the second direction X2 protrude from the third step surface 123 to form a second manifold mounting portion 127, an end surface of the second manifold mounting portion 127 along the second direction X2 is a fourth step surface 124, an opening of the second cooling channel 121 is opened on the fourth step surface 124, and the second manifold 132 is sleeved on the second manifold mounting portion 127 through a second flow guide interface 1325.

In the illustrated embodiment, the first side plate 14 and the second side plate 15 are respectively disposed on two sides of the box 10 along the third direction X3, and as described above, the third direction X3 may be any direction different from the first direction X1 and the second direction X2.

First plate body 11, second plate body 12, first curb plate 14 and second curb plate 15 integrated into one piece, its accessible casting, punching press, modes such as 3D printing (be additive manufacturing) realize for first plate body 11, second plate body 12, first curb plate 14 and second curb plate 15 are connected more closely, promote the structural strength of box 10.

Preferably, the third direction X3 may be perpendicular to the first direction X1 and the second direction X2, so that the first board body 11, the second board body 12, the first side board 14 and the second side board 15 may be extruded integrally, and while the structural strength of the box body 10 is ensured, the manufacturing process is simple, and the production efficiency is improved.

A plurality of mounting portions 19 are provided on the first side plate 14 and the second side plate 15, respectively, and the mounting portions 19 may be connected to the first side plate 14 or the second side plate 15 by welding, bolting, or the like. In order to make the battery pack 99 more stable after being mounted to the vehicle, mounting portions 19 are provided on both ends of the first side plate 14 and the second side plate 15 in the second direction X2. However, this is only an embodiment of the present invention, and the present invention is not limited to the number of the installation portions 19 and the specific installation manner as long as the case can be installed and fixed to the vehicle by providing the installation portions 19.

In the illustrated embodiment, the middle partition 181 is parallel to the first plate 11, and preferably, the first plate 11, the middle partition 181, and the second plate 12 are all parallel.

Furthermore, the first side plate 14, the second side plate 15 and the middle partition plate 181 are integrally formed, so that the connection strength of the first side plate 14, the second side plate 15 and the middle partition plate 181 is improved, further, the middle partition plate 181 is integrally extruded with the first side plate 14 and the second side plate 15, the assembly of a plurality of parts is avoided, the production process is simplified, and the production efficiency is improved.

Middle partition 181 separates the accommodation space into first sub-accommodation space between first plate 11 and the well intermediate lamella 181 and the second sub-accommodation space between second plate 12 and the well intermediate lamella, and the box 10 is equipped with a plurality of structure roof beams 182, and structure roof beam 182 extends along second direction X2, and a plurality of structure roof beams 182 are along third direction interval distribution, and third direction X3 can be with first direction X1, the arbitrary direction that second direction X2 is different, and a plurality of structure roof beams 182 have three kinds of distribution condition:

in the first case, a plurality of structural beams 182 are located in the first sub-receiving space and are engaged with the first plate 11 and the middle partition plate 181, the structural beams 182 form an i-beam structure with the first plate 11 and the middle partition plate 181, and the plurality of structural beams 182 divide the first sub-receiving space into a plurality of receiving cavities 101.

In the second case, a plurality of structural beams 182 are located in the second sub-receiving space and are engaged with the second plate 12 and the middle partition plate 181, the structural beams 182 form an i-beam structure with the second plate 12 and the middle partition plate 181, and the plurality of structural beams 182 divide the first sub-receiving space into a plurality of receiving cavities 101.

In the third situation, the plurality of structural beams 182 are distributed in the first sub-accommodation space and the second sub-accommodation space, the structural beam 182 located in the first sub-accommodation space is engaged with the first plate body 11 and the middle partition plate 181, the structural beam 182 located in the second sub-accommodation space is engaged with the second plate body 12 and the middle partition plate 181, so that the first plate body 11, the second plate body 12, the first side plate 14, the second side plate 15, the middle partition plate 181 and the structural beam 182 support each other, a honeycomb structure with a stable structure is formed, meanwhile, the middle partition plate 181 and the structural beams 182 divide the accommodation space in the box 10 into a plurality of accommodation cavities 101, which is convenient for the battery cell 20 to be installed in the box 10, the middle partition plate 181 and the structural beams 182 limit the battery cell 20, and prevent the battery cell 20 from shaking to cause damage.

In the embodiment shown in fig. 1 to 6, the middle partition board 181, the structural beam 182, the first side board 14, and the second side board 15 are flush with each other at two ends along the second direction X2, the middle partition board 181 and the structural beam 182 divide the first opening and the second opening into a plurality of sub openings, the first cover board 16 is hermetically connected with one end of the first board body 11, the second board body 12, the first side board 14, the second side board 15, the middle partition board 181, and the structural beam 182 along the second direction X2, and the first cover board 16, the middle partition board 181, and the structural beam 182 can be sealed by welding the first cover board 16, the middle partition board 181, and one end of the structural beam 182 along the second direction X2 together through laser penetration welding. And the second cover 17 is hermetically connected to the first board 11, the second board 12, the first side board 14, the second side board 15, the middle partition 181 and the other end of the structural beam 182 along the second direction X2, so that each receiving cavity 101 forms a sealed cavity. The pole core and the electrolyte can be directly contained in the containing cavity 101, and the positive and negative poles of the pole core are led out from the first cover plate 16 or the second cover plate 17, so that the structure of the box body 10 is directly used as the shell of the battery cell 20, the shell structure of the battery cell 20 is omitted, and the energy density of the battery pack is further improved.

In the embodiment shown in fig. 7, the first cover plate 16 includes a first sub-cover plate 161 and a second sub-cover plate 162, the first sub-cover plate 161 is hermetically connected to the first board 11, the first side plate 14, the second side plate 15, the middle partition 181, and the structural beam 182 located in the first sub-receiving space, and the second sub-cover plate 162 is hermetically connected to the second board 12, the first side plate 14, the second side plate 15, the middle partition 181, and the structural beam 181 located in the second sub-receiving space. At the other end of the box body 10, the second cover plate 17 includes a third sub-cover plate 171 and a fourth sub-cover plate 172, the third sub-cover plate 171 is hermetically connected to the first plate body 11, the first side plate 14, the second side plate 15, the middle partition 181, and the structural beam 182 located in the first sub-receiving space, and the fourth sub-cover plate 172 is hermetically connected to the second plate body 12, the first side plate 14, the second side plate 15, the middle partition 181, and the structural beam 182 located in the second sub-receiving space.

In an embodiment, the partition assembly includes a plurality of intermediate partitions 181, the plurality of intermediate partitions 181 partition the box body 10 into any multi-layer structure, specifically, the plurality of intermediate partitions 181 partition the accommodating space into a first sub-accommodating space between the first plate 11 and the intermediate partitions 181, a second sub-accommodating space between the second plate 12 and the intermediate partitions 181, and a third sub-accommodating space between adjacent intermediate partitions 181, and the third sub-accommodating space may be provided in plurality, and the number of the intermediate partitions 181 may be set according to requirements to expand.

The box 10 is provided with a plurality of structural beams 182, the structural beams 182 extend along the second direction X2, the structural beams 182 are distributed at intervals along the third direction, the third direction X3 can be any direction different from the first direction X1 and the second direction X2, in this embodiment, the structural beams 182 have four distribution conditions:

In the third case, a plurality of structural beams 182 are located in the third sub-receiving space and are engaged with two adjacent middle partition boards 181, the structural beams 182 and the two adjacent middle partition boards 181 form an i-beam structure, and the plurality of structural beams 182 divide the third sub-receiving space into a plurality of receiving cavities 101.

The plurality of structural beams 182 are distributed in the first sub-accommodation space, the second sub-accommodation space and the third sub-accommodation space, the structural beam 182 located in the first sub-accommodation space is connected with the first plate body 11 and the middle partition plate 181, the structural beam 182 located in the second sub-accommodation space is connected with the second plate body 12 and the middle partition plate 181, and the structural beam 182 located in the third sub-accommodation space is connected with two adjacent middle partition plates 181, so that the first plate body 11, the second plate body 12, the first side plate 14, the second side plate 15, the middle partition plates 181 and the structural beams 182 are mutually supported, a honeycomb structure with a stable structure is formed, meanwhile, the middle partition plates 181 and the structural beams 182 divide the accommodation space in the box 10 into a plurality of accommodation cavities 101, the electric core 20 is conveniently installed in the box 10, the middle partition plates 181 and the structural beams 182 limit the electric core 20, and damage caused by shaking of the electric core 20 is prevented.

Similar to the embodiment shown in fig. 1 to 6, the first cover plate 16 is a plate body for covering the first opening, and the first cover plate 16 is hermetically connected to the first plate body 11, the second plate body 12, the first side plate 14, the second side plate 15, the middle partition 181 and one end of the structural beam 182 along the second direction X2; the second cover plate 17 is a plate body for covering the second opening, and the second cover plate 17 is hermetically connected to the first plate body 11, the second plate body 12, the first side plate 14, the second side plate 15, the middle partition 181, and the other end of the structural beam 182 along the second direction, so that each accommodating cavity 101 forms a sealed cavity.

However, this is only an embodiment of the present invention, in other embodiments, the first cover plate 16 and the second cover plate 17 may also be divided into a plurality of sub-cover plates, specifically, the first cover plate 16 includes a first sub-cover plate 161, a second sub-cover plate 162 and a first intermediate sub-cover plate (not shown), the first sub-cover plate 161 is hermetically connected to the first plate 11, the first side plate 14, the second side plate 15, the intermediate partition 181 near the first plate 11 and the structural beam 182 located in the first sub-receiving space, the second sub-cover plate 162 is hermetically connected to the second plate 12, the first side plate 14, the second side plate 15, the intermediate partition 181 near the second plate 12 and the structural beam 182 located in the second sub-receiving space, and the first intermediate sub-cover plate is hermetically connected to the first side plate 14, the second side plate 15, two adjacent intermediate partition 181 and the structural beam 182 located in the third sub-receiving space. Correspondingly, the second cover plate 17 includes a third sub-cover plate 171, a fourth sub-cover plate 172, and a second intermediate sub-cover plate (not shown), the third sub-cover plate 171 is hermetically connected to the first plate 11, the first side plate 14, the second side plate 15, the middle partition 181 close to the first plate 11, and the structural beam 182 located in the first sub-receiving space, the fourth sub-cover plate 172 is hermetically connected to the second plate 12, the first side plate 14, the second side plate 15, the middle partition 181, and the structural beam 182 located in the second sub-receiving space, and the second intermediate sub-cover plate is hermetically connected to the first side plate 14, the second side plate 15, the two adjacent middle partitions 181, and the structural beam 182 located in the third sub-receiving space. The specific form of the first cover plate 16 and the second cover plate 17 is not limited in the present invention, and may be only one or more, as long as the first cover plate 16 can cover the first opening, the second cover plate 17 can cover the second opening, and each accommodating cavity 101 forms a sealed cavity.

In order to further ensure the sealing performance of each receiving cavity 101, the first board body 11, the second board body 12, the first side board 14, the second side board 15, the middle partition 181, and the structural beam 182 are integrally formed, which may be implemented by casting, stamping, 3D printing (i.e., additive manufacturing), and the like.

In order to further improve the supporting capability and stability of the structural beam 182 between the first plate 11, the second plate 12 and the middle partition board 181, the joints of the structural beam 182 with the first plate 11, the second plate 12 and the middle partition board 181 have rounded corners to form smooth transition, thereby avoiding stress concentration at the joints of the structural beam 182 with the first plate 11, the second plate 12 and the middle partition board 181.

In an embodiment, the battery cell 20 is surface-connected to the first plate 11, the second plate 12 or the middle partition 181, so that the battery cell 20 can provide support for the first plate 11, the second plate 12 and the middle partition 181, for example, the battery cell 20 is a square battery with an aluminum casing, two end surfaces of the battery cell 20 located in the first sub-accommodation space along the first direction X1 are connected to the first plate 11 and the middle partition 181 close to the first plate, similarly, the battery cell 20 located in the second sub-accommodation space is connected to the second plate 12 and the middle partition 181 close to the second plate 12, the battery cell 20 located in the third sub-accommodation space is connected to two adjacent middle partitions 181, and the battery cell 20 itself can serve as a structural member of the case 10 to provide support for the case 10, and when the case 10 receives an impact or external pressure, the first plate 11 or the second plate 12 is prevented from being deformed.

In one embodiment, heat conducting structural adhesive is filled between the battery cell 20 and the first board 11, the second board 12, the structural beams 182, and the middle partition 181, on one hand, two end faces of the battery cell 20 along the first direction X1 are joined by the heat conducting structural adhesive, so as to provide support for the first board 11, the second board 12, and the middle partition 181; in the second aspect, a better heat transfer path is obtained through the heat-conducting structural adhesive, the battery cell 20 can exchange heat with the first plate 11, the second plate 12 or the middle partition board 181 through the heat-conducting structural adhesive, the end surface of the battery cell 20 in the third direction X3 also exchanges heat with the structural beam 182 through the heat-conducting structural adhesive, and the structural beam 182 transfers heat into the first plate 11 and the second plate 12, so that the cooling effect on the battery cell 20 is improved; in the third aspect, the structural stability of the battery pack 99 is improved by filling the heat-conducting structural adhesive, and the battery core 20 is fixed by the heat-conducting structural adhesive, so that the battery core 20 is prevented from shaking and colliding in the accommodating cavity to cause damage when a vehicle runs; in the fourth aspect, the heat conducting structural adhesive also has an insulating effect, and can prevent the risk of short circuit between the battery cell 20 and the first plate 11, the second plate 12, the middle partition 181, and the structural beam 182.

In the illustrated embodiment, the battery pack 99 includes an electrical connection assembly that includes an intra-layer connection tab 31 and an inter-layer connection tab 32.

The first cover plate 16 is provided with a plurality of first poles 21 corresponding to the plurality of battery cells 20, the second cover plate 17 is provided with a second pole 22 corresponding to the plurality of battery cells 20, the first poles 21 can be electrically connected with the positive terminals of the battery cells 20 or the negative terminals of the battery cells 20, the second poles 22 can be electrically connected with the positive terminals of the battery cells 20 or the negative terminals of the battery cells 20, and the directions of the positive and negative terminals of the battery cells 20 placed in the accommodating cavity 101 are determined according to specific series-parallel requirements. The electrical properties of the first pole 21 and the second pole 22 are not limited in the present invention, and can be selected according to the requirement.

It should be understood that the first cover plate 16 is provided with a plurality of first electrode posts 21, the second cover plate 17 is provided with a plurality of second electrode posts 22, this is only an embodiment of the present invention, in other embodiments, the battery cell 20 includes the first electrode posts 21 and the second electrode posts 22, the first electrode posts 21 penetrate through the first cover plate 16 and protrude out of the accommodating cavities 101, the second electrode posts penetrate through the second cover plate 17 and protrude out of the accommodating cavities 101, the plurality of first electrode posts 21 can be connected in series and in parallel through the intra-layer connecting pieces 31, the plurality of second electrode posts 22 can be connected in series and in parallel through the intra-layer connecting pieces 31, and the present invention is not limited to how to realize the electrical connection between the plurality of battery cells 20.

The battery cell 20 (the battery cell 20 located in the first sub-accommodation space, the battery cell 20 located in the second sub-accommodation space, or the battery cell 20 located in the third sub-accommodation space) located in the same sub-accommodation space corresponds to the first pole column 21 and the first pole column 21 corresponding to the other battery cell 20, and the battery cell 20 (the battery cell 20 located in the first sub-accommodation space, the battery cell 20 located in the second sub-accommodation space, or the battery cell 20 located in the third sub-accommodation space) located in the same sub-accommodation space corresponds to the second pole column 22 and the second pole column 22 corresponding to the other battery cell 20, and are electrically connected through the in-layer connection sheet 31. The first terminal 21 closest to the first side plate 14 in each sub-accommodation space is used as a first total connection terminal 27, the first total connection terminals 27 are electrically connected through an interlayer connection sheet 32, the second terminal closest to the second side plate 15 in each sub-accommodation space is used as a second total connection terminal (not shown), and the second total connection terminals are electrically connected through the interlayer connection sheet 32, so that series-parallel connection of the battery cells 20 in the battery pack 99 is realized. It should be understood that the first terminal post 21 closest to the first side plate 14 is used as the first total connection terminal 27, and the second terminal post 22 closest to the second side plate 15 is used as the second total connection terminal, which is only an embodiment of the present invention, in other embodiments, any first terminal post 21 and second terminal post 22 may be used as the first total connection terminal 27 and the second total connection terminal in different series-parallel connection manners, for example, the first terminal post 21 closest to the second side plate 15 is used as the first total connection terminal 27, and the second terminal post 22 closest to the first side plate 14 is used as the second total connection terminal, which is not limited by the present invention, as long as the battery cells 20 in different sub-housing spaces can be connected in series-parallel and led out through the first total connection terminal 27 and the second total connection terminal 28.

In the present embodiment, the first board 11, the second board 12, the first side board 14, the second side board 15, and the middle partition board 181 are extruded integrally by the structural beam 182, meanwhile, the end portions of the first side plate 14, the second side plate 15, the intermediate partition 181, the structural beam 182 in the second direction X2 and the end portions of the first plate body 11 and the second plate body 12 in the second direction X2 close to the accommodating cavity 101 are milled away, a new end portion of the first side plate 14, the second side plate 15, the intermediate partition 181, and the structural beam 182 is formed along the second direction X2, the first plate body 11 forms a first step surface 113 and a protruding first manifold mounting portion 117 which are flush with the new end portions of the first side plate 14, the second side plate 15, the intermediate partition 181, and the structural beam 182 in the second direction X2, and the second plate body 12 forms a third step surface 123 and a protruding second manifold mounting portion 127 which are flush with the new end portions of the first side plate 14, the second side plate 15, the intermediate partition 181, and the structural beam 182 in the second direction X2. The first cooling passage 111 is integrally extruded with the first plate body 11, the opening of the first cooling passage 111 is opened in the first manifold mounting portion 117, the second cooling passage 121 is integrally extruded with the second plate body 12, the opening of the second cooling passage 121 is opened in the second manifold mounting portion 127, and the first manifold 131 and the second manifold 132 are mounted on the first manifold mounting portion 117 and the second manifold 127, respectively. And the first cover plate 16 and the second cover plate 17 are welded on the first step surface 113, so that the installation of the first collecting pipe 131 and the second collecting pipe 132 and the installation of the first cover plate 16 and the second cover plate 17 are not affected, and the assembly is convenient.

In another aspect, the present invention provides a vehicle including a vehicle body and a battery pack 99, the battery pack 99 being mounted to the vehicle body through a mounting portion 19. The vehicle adopting the battery pack 99 reduces redundant parts and further realizes the light weight of the vehicle. The positive and negative poles of the battery cell 20 are led out from the first cover plate 16 or the second cover plate 17, the first plate 11 can support other components of the vehicle, and the second plate 12 can be a part of the vehicle floor.

In summary, the present disclosure provides a battery pack 99 and a vehicle having the battery pack 99, where the battery pack 99 includes a box body 10 and a battery cell 20 disposed in the box body 10, the box body 10 includes a first plate 11, a second plate 12, a first side plate 14, a second side plate 15, an intermediate partition 181, and a structural beam 182, the first plate 11 and the second plate 12 are extruded integrally, and the first cooling channel 111 and the second cooling channel 121 are extruded simultaneously by the first plate 11 and the second plate 12, so that the first plate 11 and the second plate 12 can be directly used as heat management components, the process is simple, redundant structures are saved, the intermediate partition 181 can be one or more, the intermediate partition 181 divides the accommodating space in the box body 10 into a plurality of sub-accommodating spaces, a plurality of intermediate partitions 181 can be disposed according to different requirements for multi-layer expansion, and the plurality of structural beams 182 support the first plate 11 and the intermediate partitions 181, the second plate 12 and the intermediate partitions 181 or between two adjacent intermediate partitions 181, form a stable i-shaped structure and separate each sub-accommodation space to form a plurality of accommodation cavities 101 for accommodating the battery cells 20. The overall structural strength of the battery pack 99 is ensured, and the battery core 20 is conveniently mounted in the box body 10. The vehicle having the battery pack 99 reduces redundant parts, and further realizes the weight reduction of the vehicle.

The concepts described herein may be embodied in other forms without departing from the spirit or characteristics thereof. The particular embodiments disclosed should be considered illustrative rather than limiting. The scope of the disclosure is, therefore, indicated by the appended claims rather than by the foregoing description. Any changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 disclosure. 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.

Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that variations, modifications, substitutions and alterations may be made in the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present disclosure.

Claims

1. The utility model provides a battery pack, includes the box and is located electric core in the box, its characterized in that, the box includes:

a manifold assembly in communication with the first cooling passage;

2. The battery pack according to claim 1, wherein the first plate body is provided with a plurality of the first cooling passages arranged in a third direction different from the first and second directions, and the manifold assembly includes two first manifold pipes, one of the first manifold pipes communicates with one ends of the plurality of first cooling passages, and the other of the first manifold pipes communicates with the other ends of the plurality of first cooling passages, thereby achieving the communication of the plurality of first cooling passages.

3. The battery pack according to claim 2, wherein one of the first manifold pipes is provided with a first inlet through which a cooling medium is introduced, and the other of the first manifold pipes is provided with a first outlet through which the cooling medium is discharged.

4. The battery pack of claim 1, wherein the first cooling channel is integrally formed with the first plate body.

5. The battery pack of claim 4, wherein the first cooling channel is integrally extruded from the first plate body.

6. The battery pack according to claim 1, wherein both ends of the first plate in the second direction protrude from the structural beam, the first side plate, the second side plate, and the intermediate partition.

7. The battery pack according to claim 6, wherein the bus bar assembly includes two first bus bars, the first bus bars are provided with first flow guide ports, and the two first bus bars are sleeved on two ends of the first plate body along the second direction through the first flow guide ports so that the first cooling passages are communicated with the first bus bars.

8. The battery pack according to claim 6, wherein both ends of the first plate body in the second direction are formed with first steps, so that both ends of the first plate body in the second direction are formed with first step faces and second step faces;

9. The battery pack according to claim 8, wherein an end surface of the second plate body in the second direction is flush with the first step surface.

10. The battery pack according to claim 1, wherein a second cooling passage is provided through the second plate body in the second direction, and the bus bar assembly is in communication with the second cooling passage.

11. The battery pack according to claim 10, wherein the second plate body is provided with a plurality of the second cooling passages arranged at intervals in a third direction, the third direction being different from the first direction and the second direction, and the manifold assembly includes two second manifold pipes, one of the second manifold pipes communicates with one ends of the plurality of the second cooling passages, and the other of the second manifold pipes communicates with the other ends of the plurality of the first cooling passages, thereby achieving communication of the plurality of the second cooling passages.

12. The battery pack according to claim 11, wherein one of the second manifold pipes has a second inlet through which a cooling medium is introduced, and the other of the second manifold pipes has a second outlet through which the cooling medium is discharged.

13. The battery pack of claim 10, wherein the second cooling channel is integrally formed with the second plate body.

14. The battery pack of claim 13, wherein the second cooling channel is integrally extruded from the second plate body.

15. The battery pack according to claim 10, wherein both ends of the second plate body in the second direction protrude from the intermediate partition, the structural beam, the first side plate, and the second side plate.

16. The battery pack according to claim 15, wherein the bus bar assembly includes two second bus bars, the second bus bars are provided with second flow guide ports, and the two second bus bars are sleeved on two ends of the second plate body along the second direction through the second flow guide ports so as to communicate the second cooling passages with the second bus bars.

17. The battery pack according to claim 15, wherein both ends of the second plate body in the second direction are formed with second steps, so that both ends of the second plate body in the second direction are formed with third and fourth step faces;

18. The battery pack according to claim 1, wherein the first side plate and the second side plate are respectively provided on both sides of the case in a third direction, the third direction being different from the first direction and the second direction.

19. The battery pack of claim 18, wherein the first panel, the second panel, the first side panel, and the second side panel are integrally formed.

20. The battery pack of claim 19, wherein the first panel, the second panel, the first side panel, and the second side panel are integrally extruded.

21. The battery pack according to claim 1, wherein the mounting portion is provided on the first side plate and/or the second side plate.

22. The battery pack of claim 1, wherein the intermediate separator is parallel to the first plate body.

23. The battery pack of claim 1, wherein the first side panel, the second side panel, and the intermediate separator are integrally formed.

24. The battery pack of claim 1, wherein the intermediate separator is integrally extruded with the first and second side plates.

25. The battery pack of claim 1, wherein the battery pack comprises a first cover plate that covers the first opening and a second cover plate that covers the second opening.

26. The battery pack of claim 25, wherein the intermediate partition divides the receiving space into a first sub-receiving space between the first plate and the intermediate partition and a second sub-receiving space between the second plate and the intermediate partition, the case being provided with a plurality of structural beams extending in the second direction;

27. The battery pack according to claim 26, wherein the first cover plate is sealingly connected to one end of the first plate body, the second plate body, the first side plate, the second side plate, the intermediate partition plate, and the structural beam in the second direction, and the second cover plate is sealingly connected to the other end of the first plate body, the second plate body, the first side plate, the second side plate, the intermediate partition plate, and the structural beam in the second direction, such that each of the receiving cavities forms a sealed cavity.

28. The battery pack according to claim 26, wherein the first cover plate comprises a first sub-cover plate and a second sub-cover plate, the first sub-cover plate is hermetically connected with the first plate body, the first side plate, the second side plate, the middle partition plate and the structural beam located in the first sub-receiving space, and the second sub-cover plate is hermetically connected with the second plate body, the first side plate, the second side plate, the middle partition plate and the structural beam located in the second sub-receiving space;

29. The battery pack of claim 25, wherein the partition assembly includes a plurality of intermediate partitions that partition the receiving space into a first sub-receiving space between the first plate and the intermediate partitions, a second sub-receiving space between the second plate and the intermediate partitions, and a third sub-receiving space between adjacent intermediate partitions, the case being provided with a plurality of structural beams extending in the second direction;

30. The battery pack according to claim 29, wherein the first cover plate is sealingly connected to one end of the first plate body, the second plate body, the first side plate, the second side plate, the intermediate partition plate, and the structural beam in the second direction, and the second cover plate is sealingly connected to the other end of the first plate body, the second plate body, the first side plate, the second side plate, the intermediate partition plate, and the structural beam in the second direction, such that each of the receiving cavities forms a sealed cavity.

31. The battery pack according to claim 29, wherein the first cover plate comprises a first sub-cover plate, a second sub-cover plate and a first intermediate sub-cover plate, the first sub-cover plate is hermetically connected with the first plate body, the first side plate, the second side plate, the intermediate partition plate and the structural beam located in the first sub-receiving space, the second sub-cover plate is hermetically connected with the second plate body, the first side plate, the second side plate, the intermediate partition plate and the structural beam located in the second sub-receiving space, and the first intermediate sub-cover plate is hermetically connected with the first side plate, the second side plate, two adjacent intermediate partition plates and the structural beam located in the third sub-receiving space;

32. The battery pack of any one of claims 25-31, wherein the first panel, the second panel, the intermediate separator, and the structural beam are integrally formed.

33. The battery pack of any one of claims 25-31, wherein thermally conductive structural adhesive is filled between the electrical core and the first plate, the second plate, the structural beam, and the intermediate separator.

34. A vehicle characterized by comprising a vehicle body and the battery pack according to any one of claims 1 to 34, the battery pack being mounted to the vehicle body through the mounting portion.