CN111430630A

CN111430630A - Battery pack

Info

Publication number: CN111430630A
Application number: CN202010362476.5A
Authority: CN
Inventors: 单小林; 刘建华; 王珏; 曲凡多; 翁百川
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-07-17
Anticipated expiration: 2040-04-30
Also published as: CN111430630B

Abstract

The invention discloses a battery pack. The battery pack includes: casing, battery module and battery management module have in the casing and hold the chamber, and the battery module is located and holds the chamber, and the battery module includes: the battery management module is positioned in the containing cavity, and the battery management module is electrically connected with the first module and the second module. The first module and the second module are spaced to form a shell recessed area, most of the battery management module can be located in the shell recessed area, the battery management module can be conveniently electrically connected with the first module and the second module, the space of the shell recessed area can be fully utilized, the first module with the small thickness can be correspondingly placed below the part with the large size, the second module with the large thickness can be correspondingly placed below the part with the small size, and therefore the arrangement of the battery pack is reasonable.

Description

Battery pack

Technical Field

The invention relates to the technical field of batteries, in particular to a battery pack.

Background

The design of the arrangement scheme of the battery pack is crucial, the arrangement scheme of the battery pack is a cornerstone designed for each part, the envelope limitation of the battery pack on the whole vehicle needs to be considered, and the arrangement mode, the structural design, the electrical arrangement, the sealing scheme and the like of all parts in the whole battery pack are also related, but the current battery pack has no reasonable arrangement scheme.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the invention provides the battery pack, and the arrangement scheme of the battery pack is reasonable.

The battery pack according to an embodiment of the present invention includes:

a housing, the housing comprising: the upper shell and the lower shell are connected, the accommodating cavity is defined between the upper shell and the lower shell, a middle channel cavity is defined at the middle line position of the accommodating cavity, and the lower shell is formed into a grid type frame and comprises: the battery module comprises a bottom plate, side beams, a plurality of cross beams and a plurality of longitudinal beams, wherein the side beams are positioned around the bottom plate and fixedly connected with the bottom plate, the cross beams are positioned between the bottom plate and the battery module, the cross beams are transversely arranged along the bottom plate and fixedly connected with the side beams on the two sides of the bottom plate or the bottom plate, the longitudinal beams are positioned between the first module and the second module and fixedly connected with the two cross beams, and the longitudinal beams are longitudinally arranged along the bottom plate;

the battery module, the battery module is located hold the chamber in, the battery module includes: the device comprises a first module and a second module, wherein a shell recessed area is formed between the first module and the second module, and the thickness of the first module is not higher than that of the second module;

the battery management module is positioned in the accommodating cavity and is electrically connected with the first module and the second module.

According to some embodiments of the invention, the edge beam comprises: the front edge beam is positioned at the front end of the bottom plate, the rear edge beam is positioned at the rear end of the bottom plate, the side edge beams are positioned at the two transverse sides of the bottom plate, and the side edge beams are connected with the front edge beam and the rear edge beam end to end; the side member includes: the side beam body is located at the front end of the avoidance boundary beam, the side beam body is connected with the front edge beam, the avoidance boundary beam is connected with the rear edge beam, and the rear ends of the avoidance boundary beams on the two sides extend towards directions close to each other.

According to some embodiments of the invention, the edge beam is provided with at least one relief notch.

According to some embodiments of the invention, at least one vehicle body attachment point is provided between the upper shell and the lower shell, the vehicle body attachment point comprising: the installation base is fixedly connected with the lower shell, the installation base is provided with a first through hole, the upper shell is provided with a second through hole, and the automobile body fastener is suitable for penetrating through the first through hole and fixed with an automobile body after the second through hole.

Further, the mounting base includes: the fixing seat is positioned below the connecting seat and fixedly connected with the connecting seat, and the fixing seat is fixedly connected with the longitudinal beam;

the connecting seat forms into cylindric connecting seat, just the upper end of connecting seat is equipped with outer wall and inner wall, the inner wall is located the outer wall is inboard, first through-hole is located in the inner wall, the inner wall with have the clearance between the outer wall, the inner wall height is higher than the outer wall, just the inner wall is suitable for wearing to establish the second through-hole, go up the casing and support and press on the outer wall, with go up the casing, the inner wall with inject first sealed chamber between the outer wall, first sealing washer is located in the first sealed chamber.

According to some embodiments of the present invention, the upper housing is provided with a first guiding groove and a second guiding groove, the first guiding groove and the second guiding groove are located below the recessed area of the housing and close to two sides of the middle passage cavity, and the first guiding groove and the second guiding groove are oppositely arranged in a back direction and inclined towards an oblique lower direction.

According to some embodiments of the present invention, the first module is formed as a single-layer module, the first module includes a first single-layer module and a second single-layer module which are symmetrically disposed, and a high voltage end and a low voltage end of the first single-layer module are located at the same end of the first single-layer module, and a high voltage end and a low voltage end of the second single-layer module are located at the same end of the second single-layer module, and the high voltage end and the low voltage end of the first single-layer module and the second single-layer module are oppositely disposed.

Further, the second module is formed as a hybrid module, the second module comprises a first double-layer module and a second double-layer module which are symmetrically arranged and a third single-layer module and a fourth single-layer module which are symmetrically arranged, a high voltage end and a low voltage end of the first double-layer module are positioned at the same end of the first double-layer module, a high voltage end and a low voltage end of the second double-layer module are positioned at the same end of the second double-layer module, and the high voltage end and the low voltage end of the first double-layer module and the low voltage end of the second double-layer module are oppositely arranged; the high-voltage end and the low-voltage end of the third single-layer module are located at the same end of the third single-layer module, the high-voltage end and the low-voltage end of the fourth single-layer module are located at the same end of the fourth single-layer module, and the third single-layer module and the high-voltage end and the low-voltage end of the fourth single-layer module are arranged oppositely.

Furthermore, the high-voltage end of the first module is connected with the high-voltage end of the second module through a high-voltage wire harness in an inserting manner, the low-voltage end of the first module is connected with the low-voltage end of the second module through a low-voltage wire harness in an inserting manner, and the high-voltage wire harness and the low-voltage wire harness are electrically connected with the battery management module;

the high-voltage wire harness is located in the middle channel cavity, the high-voltage wire harness protrudes out of the bottom plate, the high-voltage wire harness is provided with a high-voltage plug-in and a quick-charging plug-in, the low-voltage wire harness is provided with a low-voltage plug-in, the front edge beam is provided with a front plug-in panel, the high-voltage plug-in and the low-voltage plug-in are suitable for being fixed in the front plug-in panel, the rear edge beam is provided with a rear plug-in panel, and the quick-charging plug-in is.

Further, the boundary beam with be equipped with casing installation limit point position between the last casing, it includes to go up casing installation limit point position: the fastener holds cavity and casing fastener, the fastener hold the cavity with hold the chamber and keep apart, the fastener holds the cavity and is equipped with first spacing hole, go up be equipped with on the casing be suitable for with the spacing hole of second that first spacing hole is aligned, the casing fastener is suitable for in proper order wear to establish the spacing hole of second with behind the first spacing hole, the spiro union in the fastener holds in the cavity.

The battery pack provided by the embodiment of the invention has the following characteristics:

this battery pack's battery module comprises first module and the second module that two sets of thicknesses are different, and the interval is come between first module and the second module, in order to form the casing depressed area, most of battery management module can be in the casing depressed area, not only can be convenient for be connected with first module and second module electricity, can also make full use of the space of casing depressed area, first module that thickness is thinner can correspond places in the great below of part volume, second module that thickness is thicker can correspond places in the less below of part volume, thereby guarantee that the arrangement of battery pack is comparatively reasonable, the space that is favorable to guaranteeing the driver's cabin is comparatively spacious.

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

Drawings

Fig. 1 is a perspective view of a battery pack;

fig. 2 is a disassembled schematic view of the battery pack;

fig. 3 is a perspective view of a battery pack without an upper case;

fig. 4 is a schematic top view of a battery pack;

FIG. 5 is a schematic cross-sectional view taken at B-B of FIG. 4;

FIG. 6 is a disassembled schematic view of the vehicle body attachment point;

FIG. 7 is a schematic perspective view of the lower housing;

FIG. 8 is an enlarged schematic view at D of FIG. 7;

FIG. 9 is a schematic cross-sectional view taken at A-A of FIG. 8;

FIG. 10 is a schematic cross-sectional view taken at C-C of FIG. 4;

fig. 11 is a schematic cross-sectional view at the first channel.

Reference numerals:

a battery pack 100;

the device comprises an upper shell 1, a first diversion trench 11, a second diversion trench 12, an explosion-proof valve 13 and buffer foam 14;

the lower shell 2, the bottom plate 21, the cross beam 22, the longitudinal beam 23, the front edge beam 24, the front insert panel 241, the rear edge beam 25, the rear insert panel 251, the side beam body 261, the avoiding edge beam 262, the connecting arm 27, the avoiding gap 271, the middle channel cavity 28 and the rubber strip 29;

a fixed point location 31, a primary location point location 321, a secondary location point location 322, an equipotential point location 33, an upper housing mounting limit point location 34, a fastener receiving cavity 341, and a housing fastener 342;

the high-voltage wire harness module comprises a first module 41, a first single-layer module 411, a second single-layer module 412, a second module 42, a first double-layer module 421, a second double-layer module 422, a third single-layer module 423, a fourth single-layer module 424, a high-voltage wire harness 43, a low-voltage wire harness 44, a wire harness support 45, a high-voltage plug-in 46, a quick-charging plug-in 47 and a low-voltage plug-in 48;

a controller 51, a master control board 52, a slave control board 53;

a cooling plate 61, a cooling connecting pipe 62, a heat conducting pad 64, a heat insulating pad 65 and a cooling plate support strip 66;

the vehicle body connecting point 7, the mounting base 71, the fixing seat 711, the connecting seat 712, the bolt 721, the nut 722, the first sealing cavity 73, the first sealing ring 731, and the second sealing ring 741.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The battery pack 100 according to an embodiment of the present invention is described in detail below with reference to fig. 1 to 11.

Referring to fig. 1 to 3, a battery pack 100 according to an embodiment of the present invention includes: casing, battery module and battery management module have in the casing and hold the chamber, and the battery module is located and holds the chamber, and the battery module includes: the battery management module comprises a first module 41 and a second module 42, a shell recessed area is formed between the first module 41 and the second module 42, the thickness of the first module 41 is not higher than that of the second module 42, the battery management module is located in the containing cavity, and the battery management module is electrically connected with the first module 41 and the second module 42.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

That is to say, the battery module includes two sets of first module 41 and second module 42 with different thicknesses, and the first module 41 and the second module 42 are spaced apart from each other to form a housing recess, and the battery management module is used for detecting the battery module, thereby ensuring the working safety of the battery module.

Specifically, the first module 41 that thickness is thinner can correspond and place in the great below of part volume, the second module 42 that thickness is thicker can correspond and place in the less below of part volume, the most of battery management module can be in the casing depressed area, not only can be convenient for be connected with first module 41 and second module 42, because the volume of battery module is less, the space of casing depressed area can also make full use of, thereby guarantee that arranging of battery package 100 is less as far as the space that occupies the driver's cabin, guarantee that the space of driver's cabin is great.

In a specific embodiment, the battery pack 100 can be located below the cab, and the volume of the front seat is large, so the first module 41 can be located below the front seat, and the volume of the rear seat is small, so the second module 42 can be located below the rear seat, and the shell recessed area located between the first module 41 and the second module 42 can correspond to the pedal position of the rear seat, so the shell recessed area can ensure that the terrain of the rear pedal is low, so that the comfort of the rear passenger is good, and the arrangement scheme of the battery pack 100 is reasonable.

According to the battery pack 100 of the embodiment of the invention, the battery modules of the battery pack 100 are composed of two groups of the first module 41 and the second module 42 with different thicknesses, the first module 41 and the second module 42 are spaced to form the housing recessed area, most of the battery management modules can be positioned in the housing recessed area, so that the battery management modules can be conveniently and electrically connected with the first module 41 and the second module 42, the space of the housing recessed area can be fully utilized, the first module 41 with the smaller thickness can be correspondingly placed below the part with the larger volume, and the second module 42 with the thicker thickness can be correspondingly placed below the part with the smaller volume, so that the arrangement of the battery pack 100 is more reasonable, and the space of a cab is more spacious.

Further, as shown in fig. 2-3, 7, the housing may include: go up casing 1 and casing 2 down, go up casing 1 and casing 2 and link to each other, and go up casing 1 and casing 2 down between inject and hold the chamber, hold the middle line position department in chamber and inject middle passageway chamber 28, through inject middle passageway chamber 28, for the pencil of connecting first module 41 and second module 42, cool off the pipeline of first module 41 and second module 42 and provide the space of arranging.

Further, as shown in fig. 7, the lower case 2 is formed as a lattice-type frame and includes: bottom plate 21, boundary beam, a plurality of crossbeam 22 and a plurality of longeron 23, the boundary beam be located bottom plate 21 all around and with bottom plate 21 fixed connection, a plurality of crossbeams 22 are located between bottom plate 21 and the battery module, crossbeam 22 along bottom plate 21 transverse arrangement and with bottom plate 21 or the boundary beam fixed connection of bottom plate 21 both sides, a plurality of longerons 23 are located between first module 41 and the second module 42, and longeron 23 and two crossbeam 22 fixed connection, longeron 23 is along the longitudinal arrangement of bottom plate 21.

By providing a plurality of cross members 22 and longitudinal members 23, mountable support is provided for arranging the first module 41, the second module 42, the battery management module, and other components (i.e., the high-voltage wire harness 43, the low-voltage wire harness 44, the cooling connection pipe 62, etc., mentioned below). In addition, the overall strength of the battery pack 100 can be increased, force transmission is facilitated, and the battery pack is safer under the condition of side collision of the whole vehicle.

Further, as shown in fig. 2 and 7, the edge beam may include: the battery pack 100 comprises a front edge beam 24, a rear edge beam 25 and side edge beams, wherein the front edge beam 24 is positioned at the front end of a bottom plate 21, the rear edge beam 25 is positioned at the rear end of the bottom plate 21, the side edge beams are positioned at the two transverse sides of the bottom plate 21, the side edge beams are connected with the front edge beam 24 and the rear edge beam 25 in an end-to-end mode, namely the front edge beam 24, the rear edge beam 25 and the side edge beams surround a circle, the bottom plate 21 is positioned below the front edge beam 24, the rear edge beam 25 and the side edge beams, the front edge beam 24, the rear edge beam 25 and the side edge beams can be arranged, the possibility is provided for the battery pack 100 to be fixedly connected with a sheet metal part of a vehicle body, and an accommodating cavity can be formed by being matched with an upper.

Further, as shown in fig. 2 and 7, the side frame includes: the side edge beam body 261 and the avoidance edge beam 262, the side edge beam body 261 is located at the front end of the avoidance edge beam 262, the side edge beam body 261 is connected with the front edge beam 24, the avoidance edge beam 262 is connected with the rear edge beam 25, and the rear ends of the avoidance edge beams 262 on both sides extend toward the directions close to each other.

That is to say, lower casing 2 is "shi" font, can more laminate the bottom panel beating shape of driver's cabin.

Further, the front side beam 24, the rear side beam 25, and the side beam body 261 are formed as a double-cavity beam having an outer cavity and an inner cavity, the upper case 1 is fixed to the cavity wall of the outer cavity in an overlapping manner, and the battery module is fixed to the cavity wall of the inner cavity in an overlapping manner.

Firstly, sequentially welding a front side beam 24, a rear side beam 25 and side beams into a frame, then welding a through cross beam 22CMT inside the frame, welding a longitudinal beam 23CMT in the middle of the cross beam 22, and finally welding a bottom plate 21FSW at the bottom of the lower shell 2;

it should be noted that, in the specific embodiment, the lower housing 2 employs the scheme of tailor welding the profile boundary beam and the cast aluminum boundary beam, wherein, because of being limited by the layout space of the whole vehicle, the avoiding boundary beam 262 is the cast aluminum boundary beam, thereby ensuring that the avoiding boundary beam 262 can be bent, and further avoiding the bottom space of the vehicle, and other boundary beams are the profile boundary beams with double cavities, and can be used for simultaneously installing the battery module and the upper housing 1, compared with the separate design of the installation beam of the battery module and the installation beam of the upper housing 1, the weight of the battery pack 100 can be ensured to be lighter, and the structure is compact, and dust is not easy to leave.

In a specific embodiment, the connection of the upper case 1 and the lower case 2 of the battery pack 100 may be fixed by a rivet nut.

Specifically, as shown in fig. 1-4 and 7, the edge beam includes a connecting arm 27 extending away from the battery module, and the connecting arm 27 is provided with a plurality of fixing points 31, at least one positioning point and at least one equipotential point 33.

Wherein, fixed point location 31 equipartition is on the boundary beam to guarantee that battery package 100 and vehicle bottom sheet metal connected are reliable, specifically, fixed point location 31 can be the fixed point location 31 of bolt 721, and, bond through adhesive tape 29 between battery package 100 and the vehicle bottom sheet metal and seal.

In the embodiment shown in fig. 1-4, the side rails on both sides have 7 mounting points each, the front rail 24 has 6 mounting points, and the rear rail 254 has mounting points, thereby ensuring secure attachment of the battery pack 100.

Further, as shown in fig. 1 to 4, the number of the positioning points is two, the two positioning points are respectively the main positioning point 321 and the auxiliary positioning point 322, the main positioning point 321 is located on the side beam body 261 on one side, the auxiliary positioning point 322 is located on the side beam body 261 on the other side, and by setting the two positioning points, when the battery pack 100 is fixedly matched with the underbody metal plate, the position of the battery pack 100 can be positioned through the positioning points, thereby ensuring that the fixing position of the battery pack 100 is accurate.

Specifically, as shown in fig. 1 to 4, the number of the equipotential points 33 is two, two equipotential points 33 are respectively located on the side beam bodies 261 on both sides, and by setting the equipotential points 33, the safety of the operator can be ensured.

Specifically, the equipotential points 33 include: the connecting arm 27 is worn to establish by the bush and from the bolt that discharges, and after the bush was worn to establish by the bolt that discharges, with the battery package mounting threaded connection who is used for installing battery package 100 to it is reliable to guarantee the contact of battery package 100 and vehicle bottom panel beating, and is safer, reliable for through bonding copper bar and bonding wire.

Specifically, as shown in fig. 1 and 7, at least one avoidance notch 271 is provided on the edge beam, the arrangement of the battery pack 100 in the entire vehicle needs to consider the positions of peripheral components and the operation space of tools, and in the assembly and production process of the entire vehicle, the vehicle body hanging structure interferes with the edge beam of the battery pack 100, so that the arrangement of the battery pack 100 can be more reasonable by providing the corresponding avoidance notch 271 on the edge beam.

Specifically, as shown in fig. 1, 4, and 7, at least one vehicle body connection point 7 is disposed between the upper housing 1 and the lower housing 2, and by disposing the vehicle body connection point 7, the stiffness and NVH performance of the entire vehicle can be improved.

Specifically, as shown in fig. 5-6, the body attachment point location 7 may include: the installation base 71 and the automobile body fastener are fixedly connected, the installation base 71 is fixedly connected with the lower shell 2, a first through hole is formed in the installation base 71, a second through hole is formed in the upper shell 1, and the automobile body fastener is suitable for being fixed with an automobile body after penetrating through the first through hole and the second through hole.

Further, as shown in fig. 6, the mounting base 71 includes: fixing seat 711 is positioned below connecting seat 712 and is fixedly connected with connecting seat 712, and fixing seat 711 is fixedly connected with longitudinal beam 23;

connecting seat 712 forms to cylindric connecting seat 712, and the upper end of connecting seat 712 is equipped with outer wall and inner wall, and the inner wall is located the outer wall inboard, and first through-hole is located the inner wall, has the clearance between inner wall and the outer wall, and the inner wall height is higher than the outer wall, and the inner wall is suitable for wearing to establish the second through-hole, goes up casing 1 and supports to press on the outer wall to inject first sealed chamber 73 between last casing 1, inner wall and outer wall, first sealing washer 731 is arranged in first sealed chamber 73.

Further, the vehicle body fastener includes: the bolt 721, the nut 722, bolt 721 wear to establish first through-hole after with the automobile body spiro union to realize the fixed connection of battery package 100 and automobile body floor.

The nut 722 is adapted to be in threaded engagement with the outside of the inner wall, and the outside of the nut 722 is provided with a circumferential groove, thereby achieving a fixed connection of the upper housing 1 and the lower housing 2, and defining a second sealed chamber in which a second sealing ring 741 is at least partially located.

That is to say, the mounting base 71 is designed to be of an "upper round and lower" structure, the connecting seat 712 of the upper half portion is of a round structure and can be more easily matched with the first sealing ring 731 and the second sealing ring 741, the fixing seat 711 of the lower half portion is of a square structure and can be conveniently fixedly connected with the longitudinal beam 23, in addition, the first sealing ring 731 is located between the connecting seat 712 and the upper shell 1, the sealing between the upper shell 1 and the lower shell 2 can be ensured, and the second sealing ring 741 is located between the upper shell 1 and the floor of the vehicle body, and the sealing between the upper shell 1 and the vehicle body can be ensured.

In a specific embodiment, the first sealing ring 731 and the second sealing ring 741 may both adopt a three-seal-tooth structure design, which can better ensure the sealing performance of the position, and the structure of the nut 722 is designed to be hexagonal, and a circle of "groove" structure is provided on the periphery of the nut 722, and a circle of "protrusion" structure is provided on the inner side of the second sealing ring 741, which can prevent the outer sealing ring from falling off on the mounting bolt 721, and ensure good sealing performance.

Specifically, as shown in fig. 2 to 3, the battery management module may include: the controller 51, the main control board 52 and a plurality of slave control boards 53, the controller 51, the main control board 52 and a part of the slave control boards 53 are located between the first module 41 and the second module 42, the controller 51 is located in the middle channel cavity 28, the main control board 52 and a part of the slave control boards 53 are located on two sides of the controller 51 and fixedly connected with the longitudinal beam 23, and the other part of the slave control boards 53 are located on the second module 42.

In this case, the controller 51 has a larger volume than the master control board 52 and the slave control board 53, so that the accommodating cavity space in the battery pack 100 can be fully utilized by placing the controller 51 in the middle passage cavity 28.

Further, as shown in fig. 1-2, 4, and 11, the upper housing 1 is provided with a first guiding groove 11 and a second guiding groove 12, the first guiding groove 11 and the second guiding groove 12 are located below the recessed area of the housing and close to two sides of the middle passage cavity 28, and the first guiding groove 11 and the second guiding groove 12 are oppositely disposed in a back direction and inclined toward an oblique lower side.

Because of the existence of the shell depressed area, the problems of water accumulation, impurity accumulation and the like are difficult to avoid in the long-term use process of the vehicle, the risk of corroding the battery pack 100 and the vehicle body is caused, and therefore the water accumulation, the impurities and the like in the shell groove area can be discharged out of the battery pack 100 by arranging the first diversion trench 11 and the second diversion trench 12 which are opposite to each other.

In a specific embodiment, at the outlets of the first diversion trench 11 and the second diversion trench 12, a concave drainage port design can be designed at the corresponding positions of the side beams at the two sides, and the upper shell 1 is designed along the shape, so that accumulated water, impurities and the like can smoothly flow out, and meanwhile, the connection point of the upper shell 1 and the lower shell 2 can be arranged on the inclined plane of the drainage port, so that the drainage port is prevented from flowing water for a long time, and the connection point is prevented from being corroded and sealed to fail.

Specifically, at least one explosion-proof valve 13 is provided on the upper housing 1, and in the embodiment shown in fig. 1-2 and 4, the number of the explosion-proof valves 13 is two, and the two explosion-proof valves 13 are symmetrically arranged on two sides of the second module 42.

Specifically, the buffer foam 14 is at least partially arranged above the upper shell 1, and in a specific embodiment, the gap between the upper shell 1 of the battery pack 100 and the floor of the vehicle body is small, so that the battery pack 100 is easily worn by contact during the driving process of the vehicle, and therefore the buffer foam 14 is arranged at the upper shell 1, so that the upper shell 1 of the battery pack 100 can be protected.

Specifically, as shown in fig. 2-3, the first module 41 is formed as a single-layer module, the first module 41 includes a first single-layer module 411 and a second single-layer module 412 which are symmetrically disposed, and the high voltage end and the low voltage end of the first single-layer module 411 are located at the same end of the first single-layer module 411, the high voltage end and the low voltage end of the second single-layer module 412 are located at the same end of the second single-layer module 412, and the high voltage end and the low voltage end of the first single-layer module 411 and the second single-layer module 412 are arranged opposite to each other.

Further, the second module 42 is formed as a hybrid module, the second module 42 includes a first double-layer module 421 and a second double-layer module 422 which are symmetrically arranged and a third single-layer module 423 and a fourth single-layer module 424 which are symmetrically arranged, a high voltage end and a low voltage end of the first double-layer module 421 are located at the same end of the first double-layer module 421, a high voltage end and a low voltage end of the second double-layer module 422 are located at the same end of the second double-layer module 422, and the high voltage end and the low voltage end of the first double-layer module 421 and the second double-layer module 422 are oppositely arranged; the high voltage end and the low voltage end of the third single layer module 423 are located at the same end of the third single layer module 423, the high voltage end and the low voltage end of the fourth single layer module 424 are located at the same end of the fourth single layer module 424, and the high voltage end and the low voltage end of the third single layer module 423 and the fourth single layer module 424 are arranged oppositely.

That is to say, the arrangement of the first module 41 and the second module 42 is two rows, and the high voltage end and the low voltage end of the first module 41 and the high voltage end and the low voltage end of the second module 42 are arranged oppositely, so that the high voltage end and the low voltage end can be conveniently wired, the wiring distance of the copper bar and the wiring harness can be reduced, the arrangement operation is simple, the use of the positioning part can be reduced, the short circuit of the wiring harness can be prevented, and the safety of the battery pack 100 is ensured.

In an embodiment, the sizes of the first single-layer module 411 and the second single-layer module 412 in the first module 41 may be 1P10S, the numbers thereof may be 3, the sizes of the first dual-layer module 421 and the second dual-layer module 422 in the second module 42 may be 1P9S, the numbers thereof may be 2, the sizes of the third single-layer module 423 and the fourth single-layer module 424 may be 1P7S, and the numbers thereof may be 1.

Further, the high-voltage end of the first module 41 and the high-voltage end of the second module 42 are connected in a plugging manner through a high-voltage wire harness 43, the low-voltage end of the first module 41 and the low-voltage end of the second module 42 are connected in a plugging manner through a low-voltage wire harness 44, and the high-voltage wire harness 43 and the low-voltage wire harness 44 are both electrically connected with the battery management module.

Further, the high voltage harness 43 is positioned in the intermediate passage cavity 28 with the high voltage harness 43 protruding out of the backplane 21, the high voltage harness 43 is provided with a high voltage insert 46 and a quick fill insert 47, the low voltage harness 44 is provided with a low voltage insert 48, the front edge beam 24 is provided with a front insert panel 241, the high voltage insert 46 and the low voltage insert 48 are adapted to be secured in the front insert panel 241, the rear edge beam 25 is provided with a rear insert panel 251, and the quick fill insert 47 is adapted to be secured in the rear insert panel 251.

Therefore, after the battery pack 100 is installed, the electrical connection with the battery pack 100 is simple, and only the corresponding high-voltage plug 46, low-voltage plug 48 and quick-charge plug 47 need to be connected in a plug-in manner.

Wherein, high-pressure plug-in components 46, low pressure plug-in components 48 and fill plug-in components 47 soon and all satisfy IPXXB safety requirement to, high-pressure pencil 43 and low pressure pencil 44 can be through wire harness support 45 carry out the joint installation, and it is more convenient for spiro union installation and buckle installation operation, and reducible assembly man-hour.

Further, as shown in fig. 7 to 9, an upper shell mounting limit point location 34 is provided between the edge beam and the upper shell 1, and the upper shell mounting limit point location 34 includes: the fastener holds cavity 341 and casing fastener 342, the fastener holds cavity 341 and holds the chamber and keep apart, the fastener holds cavity 341 and is equipped with first spacing hole, it is suitable for the spacing hole of second that aligns with first spacing hole to be equipped with on the upper casing 1, casing fastener 342 is suitable for wear to establish in proper order behind spacing hole of second and the first spacing hole, the spiro union holds in cavity 341 in the fastener, thereby can install casing fastener 342 in the outside of battery package 100, and then can guarantee that the inside sealed reliability of battery package 100 is high.

Further, fastener receiving cavities 341 are located in the front and

rear insert panels

241, 251, and in a specific embodiment, the front and

rear insert panels

241, 251 may be cast aluminum.

In a particular embodiment, the housing fastener 342 may include: rivet the double-screw bolt, mounting nut, wherein, utilize the plug-in components panel to be the technology characteristic of cast aluminium spare, the fastener of design on the plug-in components panel holds cavity 341 structure, and the fastener holds the interior space interval of cavity 341 structure and battery package 100 and leaves, thereby the rivet double-screw bolt wears to establish the fastener and holds behind the cavity 341 with the mounting nut cooperation, the rivet nut is located the fastener and holds in the cavity 341, just so realized the rivet double-screw bolt and installed the demand in the battery package 100 outside, thereby guaranteed the sealing performance of battery package 100.

Sealing glue can be smeared between the rivet nut and the mounting nut, so that the overall sealing performance of the battery pack 100 is further ensured.

Specifically, as shown in fig. 2 to 3, the battery pack 100 further includes: a cooling system for cooling the battery module, wherein the cooling system may include: cooling plate 61 and cooling connecting pipe 62, cooling plate 61 are located the below of battery module, and have the clearance between cooling plate 61 and the bottom plate 21, and cooling plate 61 is floated promptly, consequently, can solve the problem that cooling plate 61 atress warp, can absorb the finished piece and the assembly tolerance of battery package 100, still the risk of effectual solution bottom ball hit.

Further, the cooling plate 61 is communicated with the cooling connection pipe 62, and the cooling connection pipe 62 is located in the middle channel cavity 28, so that the wiring distance of the cooling connection pipe 62 can be reduced, the arrangement operation is simple, the use of a positioning part can be reduced, the risk of leakage of the cooling liquid can be prevented, and the safety of the battery pack 100 is ensured.

Further, the cooling system is a water cooling system, the cooling connection pipe 62 penetrates through the battery pack 100, and a cooling pipe insert is provided at the front end of the cooling connection pipe 62, so that the cooling system is easily connected to the outside.

Specifically, as shown in fig. 10, the cooling system further includes: the heat conducting pad 64 and the heat insulating pad 65, the heat conducting pad 64 is located between the cooling plate 61 and the battery module, and the heat insulating pad 65 is located on one side of the cooling plate 61 away from the battery module.

Specifically, as shown in fig. 10, the cooling system further includes: and the cooling plate support bars 66 are positioned on the cross beams 22, and are spliced with the cross beams 22, so that the cooling plates 61 are suspended, and the installation is simple.

Further, as shown in fig. 10, the supporting bar accommodating grooves are formed in the cross beam 22, the cooling plate supporting bars 66 are provided with fixing protrusions, the width of the notches of the supporting bar accommodating grooves is smaller than the width of the groove bottoms, and the fixing protrusions are suitable for being matched with the supporting bar accommodating grooves in a lateral insertion mode, that is, the cooling plate supporting bars 66 are matched with the matching mounting structures of the cross beam 22 in a negative angle mode, so that the mounting of the cooling plate supporting bars 66 is fixed and limited in the height direction, and the cooling plate supporting bars are not prone to being separated from the height direction.

According to some embodiments of the present invention, the first module 41 is located below a front seat of the cab, the second module 42 is located below a rear seat of the cab, and the recessed area of the housing is located at the rear step position, so that the entire floor 21 of the cab is ensured to be flat, although a certain protrusion is formed at the center of the rear step corresponding to the middle channel cavity 28 of the battery pack 100, most of the time, only two passengers are seated at the rear seat, and therefore, the image is small, and even if three passengers are seated at the rear seat, the passengers in the middle position can place both feet at both sides of the middle channel cavity 28 due to the small protrusion width and height of the middle channel cavity 28, so that the comfort of the feet of the middle passengers is ensured not to be too poor.

In a particular embodiment, the battery pack 100 may be used in a vehicle, wherein the vehicle is a new energy vehicle.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A battery pack, comprising:

a housing, the housing comprising: go up casing (1) and casing (2) down, go up casing (1) with casing (2) link to each other down, just go up casing (1) with it holds the chamber to injectd between casing (2) down, the centre line position department that holds the chamber defines middle passageway chamber (28), casing (2) down forms into grid-like frame and includes: the battery module comprises a bottom plate (21), edge beams, a plurality of cross beams (22) and a plurality of longitudinal beams (23), wherein the edge beams are located on the periphery of the bottom plate (21) and fixedly connected with the bottom plate (21), the cross beams (22) are located between the bottom plate (21) and the battery module, the cross beams (22) are transversely arranged along the bottom plate (21) and fixedly connected with the bottom plate (21) or the edge beams on two sides of the bottom plate (21), the longitudinal beams (23) are located between a first module (41) and a second module (42), the longitudinal beams (23) are fixedly connected with the two cross beams (22), and the longitudinal beams (23) are longitudinally arranged along the bottom plate (21);

the battery module, the battery module is located hold the chamber in, the battery module includes: a first module (41) and a second module (42), a shell recessed area is formed between the first module (41) and the second module (42), and the thickness of the first module (41) is not higher than that of the second module (42);

a battery management module located in the housing cavity, the battery management module being electrically connected with the first module (41) and the second module (42).

2. The battery pack of claim 1, wherein the side beams comprise: the front edge beam (24) is positioned at the front end of the bottom plate (21), the rear edge beam (25) is positioned at the rear end of the bottom plate (21), the side edge beams are positioned at the two transverse sides of the bottom plate (21), and the side edge beams are connected with the front edge beam (24) and the rear edge beam (25) end to end; the side member includes: side roof beam body (261) with dodge boundary beam (262), side roof beam body (261) are located dodge the front end of boundary beam (262), side roof beam body (261) with preceding boundary beam (24) link to each other, dodge boundary beam (262) with back boundary beam (25) link to each other, and both sides dodge boundary beam (262) rear end orientation and extend near direction each other.

3. The battery pack of claim 1, wherein the edge beam is provided with at least one relief notch (271).

4. The battery pack according to claim 1, wherein at least one vehicle body connection point (7) is provided between the upper case (1) and the lower case (2), and the vehicle body connection point (7) comprises: installation base (71), automobile body fastener, installation base (71) with casing (2) fixed connection down, installation base (71) are equipped with first through-hole, upward be equipped with the second through-hole on casing (1), the automobile body fastener is suitable for and wears to establish first through-hole with it is fixed with the automobile body behind the second through-hole.

5. The battery pack according to claim 4, wherein the mounting base (71) comprises: the fixing seat (711) is positioned below the connecting seat (712) and is fixedly connected with the connecting seat (712), and the fixing seat (711) is fixedly connected with the longitudinal beam (23);

connecting seat (712) forms into cylindric connecting seat (712), just the upper end of connecting seat (712) is equipped with outer wall and inner wall, the inner wall is located the outer wall is inboard, first through-hole is located in the inner wall, the inner wall with have the clearance between the outer wall, the inner wall height is higher than the outer wall, just the inner wall is suitable for wearing to establish the second through-hole, go up casing (1) and support and press on the outer wall, with go up casing (1), the inner wall with inject first sealed chamber (73) between the outer wall, first sealing washer (731) are located in first sealed chamber (73).

6. The battery pack according to claim 1, wherein the upper case (1) is provided with a first guide groove (11) and a second guide groove (12), the first guide groove (11) and the second guide groove (12) are located below the case recessed region and close to two sides of the middle channel cavity (28), and the first guide groove (11) and the second guide groove (12) are oppositely arranged in a back direction and inclined towards an obliquely lower direction.

7. The battery pack according to claim 1, wherein the first module (41) is formed as a single-layer module, the first module (41) includes a first single-layer module (411) and a second single-layer module (412) which are symmetrically disposed, and a high voltage end and a low voltage end of the first single-layer module (411) are located at the same end of the first single-layer module (411), a high voltage end and a low voltage end of the second single-layer module (412) are located at the same end of the second single-layer module (412), and the high voltage end and the low voltage end of the first single-layer module (411) and the second single-layer module (412) are arranged opposite to each other.

8. The battery pack according to claim 7, wherein the second module (42) is formed as a hybrid module, the second module (42) includes a first double-layer module (421) and a second double-layer module (422) which are symmetrically disposed and a third single-layer module (423) and a fourth single-layer module (424) which are symmetrically disposed, the high voltage end and the low voltage end of the first double-layer module (421) are located at the same end of the first double-layer module (421), the high voltage end and the low voltage end of the second double-layer module (422) are located at the same end of the second double-layer module (422), and the high voltage end and the low voltage end of the first double-layer module (421) and the second double-layer module (422) are disposed opposite to each other; the high-voltage end and the low-voltage end of the third single-layer module (423) are located at the same end of the third single-layer module (423), the high-voltage end and the low-voltage end of the fourth single-layer module (424) are located at the same end of the fourth single-layer module (424), and the high-voltage end and the low-voltage end of the third single-layer module (423) and the fourth single-layer module (424) are arranged oppositely.

9. The battery pack according to claim 8, wherein the high-voltage end of the first module (41) and the high-voltage end of the second module (42) are connected in a plugging manner through a high-voltage wire harness (43), the low-voltage end of the first module (41) and the low-voltage end of the second module (42) are connected in a plugging manner through a low-voltage wire harness (44), and the high-voltage wire harness (43) and the low-voltage wire harness (44) are both electrically connected with the battery management module;

high-pressure pencil (43) are located in middle passageway chamber (28), just high-pressure pencil (43) protrusion bottom plate (21), high-pressure pencil (43) are equipped with high-pressure plug-in components (46) and fill plug-in components (47) soon, low-pressure pencil (44) are equipped with low pressure plug-in components (48), preceding boundary beam (24) are equipped with preceding plug-in components panel (241), high-pressure plug-in components (46) and low pressure plug-in components (48) are suitable for fixing in preceding plug-in components panel (241), back boundary beam (25) are equipped with back plug-in components panel (251), fill plug-in components (47) soon and be suitable for fixing in back plug-in components panel (251).

10. The battery pack of claim 9, wherein an upper case mounting limit point location (34) is provided between the edge beam and the upper case (1), the upper case mounting limit point location (34) comprising: the fastener holds cavity (341) and casing fastener (342), the fastener hold cavity (341) with hold the chamber and keep apart, the fastener holds cavity (341) and is equipped with first spacing hole, be equipped with on last casing (1) be suitable for with the spacing hole of second that first spacing hole is aligned, casing fastener (342) are suitable for wear to establish in proper order behind spacing hole of second and first spacing hole, the spiro union in the fastener holds in cavity (341).