CN220341303U - Battery module and battery pack - Google Patents

Abstract

The application discloses battery module and battery package, this battery module includes: the battery cell assembly and liquid cooling assembly, the liquid cooling assembly bears the battery cell assembly, the liquid cooling assembly includes the liquid cooling board, be equipped with first feed liquor connecting portion, first liquid cooling passageway and first liquid outlet connecting portion in the liquid cooling board, first feed liquor connecting portion with first liquid outlet connecting portion respectively with the both ends intercommunication of first liquid cooling passageway, first liquid cooling passageway includes two at least liquid cooling branch road of adjacent setting, the coolant liquid is at least two the flow direction in the liquid cooling branch road is the same. The battery module that this application provided has promoted the heat exchange efficiency of liquid cooling board through set up the liquid cooling branch road of two piece at least adjacent settings in first liquid cooling passageway, and then has improved the radiating effect of electric core.

Description

Battery module and battery pack

Technical Field

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

Background

The battery module can be understood as a battery core formed by combining lithium ion battery cores in a serial-parallel connection mode and additionally arranging a single battery monitoring and managing device and an assembled intermediate product. The structure of the battery cell has to play roles in supporting, fixing and protecting the battery cell, and can be summarized into 3 major items: mechanical strength, electrical properties, thermal properties and fault handling capability. Whether the position of the battery cell can be well fixed and the battery cell can be protected from deformation with the performance being damaged, whether the thermal runaway can be prevented from being spread, and the like are all criteria for judging the quality of the battery module.

The temperature environment in the battery module has great influence on the reliability, service life and performance of the battery cell, so that the display of the temperature in the battery module in a certain temperature range is particularly important. The liquid cooling technology takes away the heat generated by the battery cell through liquid convection heat exchange, and reduces the temperature of the battery cell. In the background art of chinese patent CN115275435A, paragraphs [0006] to [0008] disclose that under the teaching of chinese patent CN113437414a, a person skilled in the art may also set a liquid cooling plate between large faces of the single battery, so as to increase the usage amount of the refrigerant, thereby increasing the heat exchange efficiency of the battery module. But the liquid cooling board belongs to whole board design, has no compressibility, can't absorb the battery cell expansion force of charge and discharge in-process, if need solve the inflation buffering problem, just need set up buffer unit respectively in liquid cooling board both sides face, from this, will bring some problems, on the one hand, liquid cooling board both sides increase buffer unit for clearance increase between the battery cell has reduced battery module's energy density, on the other hand, the liquid cooling board is through carrying out heat exchange between buffer unit and the battery cell big face, buffer unit has participated in heat transfer, the liquid cooling efficiency of liquid cooling board has been reduced, make the heat exchange efficiency of liquid cooling board low, it is poor to lead to battery module's radiating effect.

Therefore, how to provide a battery module capable of improving the heat dissipation efficiency of the liquid cooling plate and further improving the heat dissipation effect of the battery module is a problem to be solved.

Disclosure of Invention

The application provides a battery module can shorten the length of liquid cooling passageway in the liquid cooling board to promote the radiating efficiency of liquid cooling board and then improve battery module's radiating effect.

In one aspect, an embodiment of the present application provides a battery module, including: the battery cell assembly and liquid cooling assembly, the liquid cooling assembly bears the battery cell assembly, the liquid cooling assembly includes the liquid cooling board, be equipped with first feed liquor connecting portion, first liquid cooling passageway and first liquid outlet connecting portion in the liquid cooling board, first feed liquor connecting portion with first liquid outlet connecting portion respectively with the both ends intercommunication of first liquid cooling passageway, first liquid cooling passageway includes two at least liquid cooling branch road of adjacent setting, the coolant liquid is at least two the flow direction in the liquid cooling branch road is the same.

Optionally, in some embodiments of the present application, the liquid cooling branch includes a liquid inlet channel, a liquid return connection portion, and a liquid return channel, where one end of the liquid inlet channel is communicated with the first liquid inlet connection portion, the other end of the liquid inlet channel is communicated with the liquid return connection portion, one end of the liquid return channel is communicated with the liquid return connection portion, and the other end of the liquid return channel is communicated with the first liquid outlet connection portion;

the liquid inlet flow channel and the liquid return flow channel extend along a first direction and are distributed along a second direction, the liquid return connecting portion extends along the second direction, and the first direction and the second direction are intersected.

Optionally, in some embodiments of the present application, at least two of the liquid cooling branches share one of the liquid return connection portions.

Optionally, in some embodiments of the present application, at least two of the liquid cooling branches are unequal in length.

Optionally, in some embodiments of the present application, the liquid cooling assembly includes a first liquid cooling plate and a second liquid cooling plate, the first liquid cooling plate is disposed on two opposite sides of a width direction of the electric core assembly, the second liquid cooling plate is disposed on a bottom surface of the electric core assembly, and the first liquid cooling plate is communicated with the second liquid cooling plate.

Optionally, in some embodiments of the present application, a second liquid inlet connection portion, a second liquid cooling channel and a second liquid outlet connection portion are disposed in the second liquid cooling plate, the second liquid inlet connection portion and the second liquid outlet connection portion are respectively communicated with two ends of the second liquid cooling channel, and the second liquid inlet connection portion is communicated with the first liquid outlet connection portion, wherein the second liquid cooling channel includes at least two liquid cooling grooves that are adjacently disposed, at least two liquid cooling grooves are all along the first direction extending and are arranged along the third direction, and the first direction is intersected with the third direction.

Optionally, in some embodiments of the present application, the second liquid inlet connection portion includes a first sub liquid inlet connection portion and a second sub liquid inlet connection portion, where the first sub liquid inlet connection portion and the second sub liquid inlet connection portion are respectively communicated with the first liquid cooling plates located at two opposite sides of the width direction of the electric core assembly; the second liquid cooling channel comprises a first sub liquid cooling channel and a second sub liquid cooling channel, the first sub liquid cooling channel is communicated with the first sub liquid inlet connecting portion, the second sub liquid cooling channel is communicated with the second sub liquid inlet connecting portion, and the first sub liquid cooling channel and the second sub liquid cooling channel respectively comprise at least two liquid cooling grooves which are adjacently arranged.

Optionally, in some embodiments of the present application, the liquid cooling assembly further includes a first liquid inlet pipe, a second liquid inlet pipe, and a liquid outlet pipe, where the first liquid inlet pipe and the second liquid inlet pipe are respectively disposed on the first liquid cooling plate, and the first liquid inlet pipe and the second liquid inlet pipe are respectively communicated with the corresponding first liquid inlet connection portion; the liquid outlet pipeline is arranged on the second liquid cooling plate and is communicated with the second liquid outlet connecting portion.

Optionally, in some embodiments of the present application, the battery module further includes a heat dissipation fin, a module collecting integrated piece, a heat insulation sheet, an end plate, and a lifting hole site, where the heat dissipation fin is disposed on the first liquid cooling plate; the module collection integrated piece sets up the top surface of electric core subassembly, the thermal-insulated piece sets up electric core subassembly length direction's relative both sides, the end plate sets up corresponding the thermal-insulated piece is kept away from one side of electric core subassembly, the hoist and mount hole site sets up on the end plate.

On the other hand, the embodiment of the application also provides a battery pack, which comprises the battery module and a shell, wherein the battery module is arranged in the shell.

The application provides a battery module, this battery module includes: the battery cell assembly and liquid cooling assembly, the liquid cooling assembly bears the battery cell assembly, the liquid cooling assembly includes the liquid cooling board, be equipped with first feed liquor connecting portion, first liquid cooling passageway and first liquid outlet connecting portion in the liquid cooling board, first feed liquor connecting portion with first liquid outlet connecting portion respectively with the both ends intercommunication of first liquid cooling passageway, first liquid cooling passageway includes two at least liquid cooling branches that set up adjacently. The battery module provided by the application shortens the length of the liquid cooling branch circuit by arranging at least two liquid cooling branch circuits which are adjacently arranged in the first liquid cooling channel, so that the flow resistance of cooling liquid is small, the circulation efficiency is high, the heat exchange efficiency of the liquid cooling plate is improved, and the heat dissipation effect of the battery cell is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a structural exploded view of a battery module provided in a first embodiment of the present application;

fig. 2 is one of side views of a battery module provided in an embodiment of the present application;

fig. 3 is a top view of a battery module provided in an embodiment of the present application;

fig. 4 is a second side view of the battery module according to the embodiment of the present application;

fig. 5 is a third side view of the battery module according to the embodiment of the present application;

FIG. 6 is a schematic view of a first configuration of the first liquid cooling plate of FIG. 1;

FIG. 7 is a second schematic diagram of the first liquid cooling plate in FIG. 1;

FIG. 8 is a schematic view of a second configuration of the first liquid cooling plate of FIG. 1;

fig. 9 is a structural exploded view of a battery module provided in a second embodiment of the present application;

FIG. 10 is a schematic diagram of a liquid cooling assembly according to a second embodiment of the present disclosure;

FIG. 11 is a schematic view of a first configuration of the second liquid cooling plate of FIG. 9;

fig. 12 is a schematic view of a second configuration of the second liquid cooling plate in fig. 9.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The embodiment of the application provides a battery module, this battery module can shorten the length of liquid cooling passageway in the liquid cooling board to promote the radiating efficiency of liquid cooling board and then improve battery module's radiating effect. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments. In addition, in the description of the present application, the term "comprising" means "including but not limited to". The terms "first," "second," "third," and the like are used merely as labels, and are used for distinguishing between different objects and not for describing a particular sequential order.

Referring to fig. 1, fig. 1 is an exploded view of a battery module according to a first embodiment of the present application. As shown in fig. 1, an embodiment of the present application provides a battery module 100, including: the battery cell assembly 10 and the liquid cooling assembly 20, the liquid cooling assembly 20 bears the battery cell assembly 10, the liquid cooling assembly 20 comprises a liquid cooling plate 30/90, a first liquid inlet connecting portion 31, a first liquid cooling channel 32 and a first liquid outlet connecting portion 33 are arranged in the liquid cooling plate 30/90, the first liquid inlet connecting portion 31 and the first liquid outlet connecting portion 33 are respectively communicated with two ends of the first liquid cooling channel 32, the first liquid cooling channel 32 comprises at least two liquid cooling branches 34 which are adjacently arranged, and the flowing directions of cooling liquid in the at least two liquid cooling branches 34 are the same.

In this embodiment, as shown in fig. 1, the battery cell assembly 10 includes a plurality of battery cells 11 arranged in a horizontal direction in sequence, the battery cells 11 are connected and fixed by structural adhesive, and the bottom and the side surfaces of the battery cells 11 are respectively glued with the liquid cooling assembly 20 by heat-conducting adhesive. Preferably, the shape of the cell 11 comprises a square, for example a square or a rectangle. The arrangement enables the battery cell assembly 10 to be neat in structure, and the first liquid cooling plate 30 can be well attached to the square battery cell 11, so that the heat dissipation efficiency of the battery module is guaranteed to the greatest extent. Specifically, the main body of the liquid cooling assembly 20 is an aluminum extrusion structure, and a sealing plug is arranged outside the first liquid cooling channel 32 to prevent liquid leakage and prevent external impurities from invading.

In this embodiment, the liquid cooling plates 30/90 include a first liquid cooling plate 30, the first liquid cooling plate 30 is disposed on two opposite sides of the width direction of the electric core assembly 10, the liquid cooling assembly 20 further includes a first liquid inlet pipe 21, a second liquid inlet pipe 22, a first liquid outlet pipe 23, a second liquid outlet pipe 24, and a bottom plate 25, the first liquid inlet pipe 21 and the second liquid inlet pipe 22 are respectively disposed on the first liquid cooling plate 30 disposed on two opposite sides of the width direction of the electric core assembly 10, and the first liquid inlet pipe 21 and the second liquid inlet pipe 22 are respectively communicated with the corresponding first liquid inlet connection portion 31; the first liquid outlet pipeline 23 is arranged opposite to the first liquid inlet pipeline 21; the second outlet conduit 24 is arranged opposite to the second inlet conduit 22. The bottom plate 25 is disposed on the bottom surface of the battery cell assembly 10, and the bottom plate 25 is fixedly connected with the first liquid cooling plate 30.

Referring to fig. 2, fig. 2 is one of side views of a battery module according to an embodiment of the present application. As shown in fig. 2, the battery module 100 further includes a heat dissipation fin 40, the heat dissipation fin 40 is disposed on the first liquid cooling plate 30, the heat dissipation fin 40 includes a plurality of heat dissipation fins 41, and the plurality of heat dissipation fins 41 are disposed at intervals along the width direction of the first liquid cooling plate 30. The heat dissipation fins 41 are arranged at intervals along the width direction of the first liquid cooling plate 30, so that more air channels communicated with the outside are formed on the heat dissipation fins 40, and further, the heat dissipation performance of the heat dissipation fins 40 is improved.

Referring to fig. 3, fig. 3 is a top view of a battery module according to an embodiment of the present disclosure. As shown in fig. 3, the battery module 100 further includes a module collecting and integrating member 50, and the module collecting and integrating member 50 is disposed on the top surface of the battery cell assembly 10. The module collection integrated piece 50 is provided with a plurality of protection frames 51 and a plurality of wiring grooves 52, the wiring grooves 52 are provided with a plurality of wire pressing strips 53, one ends of the wire pressing strips 53 are connected with the inner wall of the wiring grooves 52, and the other ends of the wire pressing strips 53 are free ends. The module collecting and integrating piece 50 is directly installed on the positive electrode side of the battery core 11 and used for limiting and fixing wiring of the wire harness. The module collection manifold 50 has first securing locations 54 at the four corners.

In this embodiment, the battery module 100 further includes a heat insulating sheet 60, the heat insulating sheet 60 is disposed on two opposite sides of the length direction of the battery cell assembly 10, and specifically, the heat insulating sheet 60 is coated with a structural adhesive and then adhered to the outer surface of the battery cell 11. The thermal insulation sheet 60 may be made of thermal insulation foam or aerogel. The heat insulating sheet 60 of the present embodiment may be made of other materials according to practical requirements, and the present embodiment is not particularly limited.

Referring to fig. 4, fig. 4 is a second side view of the battery module according to the embodiment of the present application. As shown in fig. 4, the battery module 100 further includes an end plate 70, the end plate 70 is disposed on a side of the corresponding heat insulation sheet 60 away from the battery cell assembly 10, specifically, a structural adhesive is coated between the end plate 70 and the battery cell 11, and the battery module is pre-tensioned by pressing the end plates 70 at both ends of the battery module until the battery module reaches a proper size and pre-tensioning force, and the liquid cooling assembly 20 is fixed to the end plate 70 by welding. The setting of end plate 70 makes the cell 11 expand around all can receive the centre gripping fixed, can ensure moreover that cell 11 can be according to the automatic adjustment position of inflation degree to can prevent that cell 11 from receiving the extrusion after the inflation, the risk of weeping appears even, in order to improve the security that cell 11 used. A second fixing position 71 is arranged at the upper end of the end plate 70, the second fixing position 71 corresponds to the first fixing position 54, and the end plate 70 is detachably connected with the module collecting integrated piece 50 through screws at the positions of the second fixing position 71 and the first fixing position 54.

Referring to fig. 5, fig. 5 is a third side view of the battery module according to the embodiment of the present application. As shown in fig. 5, the battery module 100 further includes a hoist hole site 80, and the hoist hole site 80 is provided on the end plate 70, and in particular, may be an intermediate position of the end plate 70. Specifically, the lifting hole site 80 is used as a lifting bearing point of the battery module, and the end plate 70 is used as a lifting bearing structure of the battery template, so that the lifting is facilitated.

Referring to fig. 6, fig. 6 is a schematic diagram of a first structure of the first liquid cooling plate in fig. 1. As shown in fig. 6, the liquid cooling branch 34 includes a liquid inlet channel 35, a liquid return connection portion 36 and a liquid return channel 37, one end of the liquid inlet channel 35 is communicated with the first liquid inlet connection portion 31, the other end of the liquid inlet channel 35 is communicated with the liquid return connection portion 36, one end of the liquid return channel 37 is communicated with the liquid return connection portion 36, and the other end of the liquid return channel 37 is communicated with the liquid outlet connection portion; the liquid inlet channel 35 and the liquid return channel 37 extend along a first direction X and are arranged along a second direction Y, the liquid return connecting portion 36 extends along the second direction Y, and the first direction X and the second direction Y intersect. Preferably, the first direction X is a longitudinal direction of the first liquid cooling plate 30, and the second direction Y is a width direction of the first liquid cooling plate 30, and the first direction X is perpendicular to the second direction Y.

Referring to fig. 7, fig. 7 is a second schematic diagram of the first structure of the first liquid cooling plate in fig. 1. As shown in fig. 7, at least two liquid cooling branches 34 share a return connection 36. Illustratively, as shown in fig. 2, the liquid cooling channel includes a first liquid cooling branch 341 and a second liquid cooling branch 342, the first liquid cooling branch 341 includes a first liquid inlet channel 351, a liquid return connection portion 36 and a first liquid return channel 371, one end of the first liquid inlet channel 351 is communicated with the first liquid inlet connection portion 31, the other end of the first liquid inlet channel 351 is communicated with the liquid return connection portion 36, one end of the first liquid return channel 371 is communicated with the liquid return connection portion 36, and the other end of the first liquid return channel 371 is communicated with the first liquid outlet connection portion 33. The second liquid cooling branch 342 includes a second liquid inlet channel 352, a liquid return connection portion 36 and a 352 second liquid return channel 372, one end of the second liquid inlet channel 352 is communicated with the first liquid inlet connection portion 31, the other end of the second liquid inlet channel 352 is communicated with the liquid return connection portion 36, one end of the second liquid return channel 372 is communicated with the liquid return connection portion 36, and the other end of the second liquid return channel 372 is communicated with the first liquid outlet connection portion 33. The first liquid inlet channel 351, the second liquid inlet channel 352, the second liquid return channel 372 and the first liquid return channel 371 are respectively adjacent and parallel, and are mutually communicated through the same liquid return connecting part 36.

The battery module 100 that this application provided sets up the liquid cooling branch road 34 of two piece at least adjacent settings in first liquid cooling passageway 32, and the coolant liquid flow direction in two piece at least liquid cooling branch road 34 is the same, has shortened the length of single liquid cooling branch road 34 for the coolant liquid flow resistance is little, circulation efficiency is high, and the liquid cooling branch road 34 of two adjacent settings has increased the area of contact of first liquid cooling board 30 and electric core assembly 10 again simultaneously, has promoted the heat exchange efficiency of liquid cooling board, and then has improved the radiating effect of electric core 11.

Referring to fig. 8, fig. 8 is a schematic diagram illustrating a second structure of the first liquid cooling plate in fig. 1 according to an embodiment of the present application. As shown in fig. 1 and 8, the embodiment of the present application provides a battery module 200, and the battery module 200 is different from the battery module 100 in that, in the battery module 200, the lengths of at least two liquid cooling branches 34 in the first liquid cooling channel 32 are not equal.

In this embodiment, as shown in fig. 8, the liquid cooling channel includes a first liquid cooling branch 341 and a second liquid cooling branch 342, the first liquid cooling branch 341 includes a first liquid inlet flow channel 351, a first liquid return connecting portion 361 and a first liquid return flow channel 371, one end of the first liquid inlet flow channel 351 is communicated with the first liquid inlet connecting portion 31, the other end of the first liquid inlet flow channel 351 is communicated with the first liquid return connecting portion 361, one end of the first liquid return flow channel 371 is communicated with the first liquid return connecting portion 361, and the other end of the first liquid return flow channel 371 is communicated with the first liquid outlet connecting portion 33. The second liquid cooling branch 342 includes a second liquid inlet channel 352, a second liquid return connection portion 362 and a second liquid return channel 372, one end of the second liquid inlet channel 352 is communicated with the first liquid inlet connection portion 31, the other end of the second liquid inlet channel 352 is communicated with the second liquid return connection portion 362, one end of the second liquid return channel 372 is communicated with the second liquid return connection portion 362, and the other end of the second liquid return channel 372 is communicated with the first liquid outlet connection portion 33. The first liquid inlet channel 351, the second liquid inlet channel 352, the second liquid return channel 372 and the first liquid return channel 371 are respectively adjacent and arranged in parallel, and the first liquid return connecting part 361 is arranged at one side of the second liquid return connecting part 362 away from the first liquid inlet connecting part 31. Further, the length of the first liquid cooling branch 341 is greater than the length of the second liquid cooling branch 342.

As a specific embodiment of the present application, referring to fig. 9 to 11, fig. 9 is a structural exploded view of a battery module provided in a second embodiment of the present application; FIG. 10 is a schematic diagram of a liquid cooling assembly according to a second embodiment of the present disclosure; fig. 11 is a first schematic view of the second liquid cooling plate in fig. 9. As shown in fig. 9 and 10, the embodiment of the present application provides a battery module 300, and the difference between the battery module 300 and the battery module 100 is that, in the battery module 300, the liquid cooling assembly 20 further includes a second liquid cooling plate 90, the second liquid cooling plate 90 is disposed on the bottom surface of the battery cell assembly 10, and the first liquid cooling plate 30 is communicated with the second liquid cooling plate 90.

In the embodiment of the present application, as shown in fig. 9 and 10, the battery module 300 includes: the battery cell assembly 10 and the liquid cooling assembly 20, the battery cell assembly 10 comprises a plurality of battery cells 11 which are transversely arranged in sequence, the liquid cooling assembly 20 comprises a first liquid cooling plate 30, a second liquid cooling plate 90, a first liquid inlet pipeline 21, a second liquid inlet pipeline 22 and a liquid outlet pipeline, wherein the first liquid inlet pipeline 21 and the second liquid inlet pipeline 22 are respectively arranged on the first liquid cooling plate 30, and the first liquid inlet pipeline 21 and the second liquid inlet pipeline 22 are respectively communicated with a corresponding first liquid inlet connecting part 31; the liquid outlet pipe is disposed on the second liquid cooling plate 90, and the liquid outlet pipe is communicated with the second liquid outlet connection portion 93.

In the embodiment of the present application, the battery module 300 further includes a heat dissipation fin 40, a module collecting integrated member 50, a heat insulation sheet 60, an end plate 70, and a lifting hole 80, where the heat dissipation fin 40 is disposed on the first liquid cooling plate 30. The module collection assembly 50 is disposed on the top surface of the cell assembly 10. The module collecting and integrating piece 50 is directly installed on the positive electrode side of the battery core 11 and used for limiting and fixing wiring of the wire harness. The heat insulating sheets 60 are disposed on opposite sides of the cell assembly 10 in the length direction. The end plate 70 is disposed on a side of the corresponding insulating sheet 60 remote from the cell assembly 10. A hoist aperture 80 is provided in the end plate 70.

In this embodiment, as shown in fig. 11, a second liquid cooling plate 90 is internally provided with a second liquid inlet connection portion 91, a second liquid cooling channel 92 and a second liquid outlet connection portion 93, the second liquid inlet connection portion 91 and the second liquid outlet connection portion 93 are respectively communicated with two ends of the second liquid cooling channel 92, and the second liquid inlet connection portion 91 is communicated with the first liquid outlet connection portion 33, wherein the second liquid cooling channel 92 comprises at least two liquid cooling grooves 94 which are adjacently arranged, the at least two liquid cooling grooves 94 extend along a first direction X and are distributed along a third direction Z, and the first direction X is intersected with the third direction Z. Specifically, the first direction X is a longitudinal direction of the first liquid cooling plate 30 and/or the second liquid cooling plate 90, and the third direction Z is a width direction of the second liquid cooling plate 90. The number of liquid cooling tanks 94 may be 2, 3, 4, 5, 6. Preferably, the number of liquid cooling tanks 94 is 6.

Referring to fig. 12, fig. 12 is a schematic view of a second structure of the second liquid cooling plate in fig. 9 according to an embodiment of the present application. As shown in fig. 9 and 12, the embodiment of the present application provides a battery module 400, and the battery module 400 is different from the battery module 300 in that, in the battery module 400, the second liquid inlet connection portion 91 in the second liquid cooling plate 90 includes a first sub-liquid inlet connection portion 911 and a second sub-liquid inlet connection portion 912, and the first sub-liquid inlet connection portion 911 and the second sub-liquid inlet connection portion 912 are respectively communicated with the first liquid cooling plates 30 located at two opposite sides of the cell assembly 10 in the width direction; the second liquid cooling channel 92 includes a first sub liquid cooling channel 921 and a second sub liquid cooling channel 922, the first sub liquid cooling channel 921 is communicated with the first sub liquid inlet connection portion 911, the second sub liquid cooling channel 922 is communicated with the second sub liquid inlet connection portion 912, and the first sub liquid cooling channel 921 and the second sub liquid cooling channel 922 include at least two liquid cooling tanks 94 adjacently disposed respectively.

The battery module 400 that this application provided is through setting up first liquid cooling board 30 and second liquid cooling board 90, and first liquid cooling passageway 32 includes the liquid cooling branch road 34 of two at least adjacent settings, and second liquid cooling passageway 92 includes the design of the liquid cooling groove 94 of two at least adjacent settings, has shortened the length of liquid cooling branch road 34 for the coolant flow resistance is little, circulation efficiency is high, has promoted the heat exchange efficiency of liquid cooling board, and then has improved the radiating effect of electric core 11. Meanwhile, liquid cooling channels are formed in the side face and the bottom face of the battery cell assembly 10, so that the contact area between the liquid cooling assembly 20 and the battery cell assembly 10 is increased, the liquid cooling effect is better, the heat exchange efficiency is higher, and uniform cooling is ensured while the temperature of the battery cell assembly 10 is reduced.

On the other hand, the embodiment of the application also provides a battery pack, which comprises the battery module and a shell, wherein the battery module is arranged in the shell. Specifically, the battery pack comprises a shell, a plurality of battery modules and an electric control assembly, wherein the battery modules are respectively and electrically connected with the electric control assembly. The casing and the electric control assembly are mature technologies in the prior art, and are not described in detail here, and the battery module is the battery module in the above embodiment.

The application provides a battery module and battery package, wherein, this battery module includes: the battery cell assembly 10 and the liquid cooling assembly 20, the liquid cooling assembly 20 includes first liquid cooling board 30, and first liquid cooling board 30 sets up in the relative both sides of battery cell assembly 10 width direction, is equipped with first feed liquor connecting portion 31 in the first liquid cooling board 30, first liquid cooling passageway 32 and first liquid outlet connecting portion 33, and first feed liquor connecting portion 31 and first liquid outlet connecting portion 33 communicate with the both ends of first liquid cooling passageway 32 respectively, and wherein, first liquid cooling passageway 32 includes two liquid cooling branch road 34 that set up adjacently at least. The battery module that this application provided has shortened the length of liquid cooling passageway through set up the liquid cooling branch road 34 of two piece at least adjacent settings in first liquid cooling passageway 32 for the coolant liquid flow resistance is little, circulation efficiency is high, has promoted the heat exchange efficiency of liquid cooling board, and then has improved the radiating effect of electric core 11.

The foregoing has described in detail a battery module provided in embodiments of the present application, and specific examples have been applied herein to illustrate the principles and embodiments of the present application, where the foregoing examples are provided to assist in understanding the methods and core ideas of the present application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

Claims (6)

1. A battery module, comprising:

a cell assembly;

the liquid cooling assembly is used for bearing the battery cell assembly and comprises a first liquid cooling plate and a second liquid cooling plate, the first liquid cooling plate is arranged on two opposite sides of the width direction of the battery cell assembly, the second liquid cooling plate is arranged on the bottom surface of the battery cell assembly, and the first liquid cooling plate is communicated with the second liquid cooling plate;

the first liquid cooling plate is internally provided with a first liquid inlet connecting part, a first liquid cooling channel and a first liquid outlet connecting part, the first liquid inlet connecting part and the first liquid outlet connecting part are respectively communicated with two ends of the first liquid cooling channel, the first liquid cooling channel comprises at least two liquid cooling branches which are adjacently arranged, and the flowing directions of cooling liquid in at least two liquid cooling branches are the same;

the liquid cooling branch comprises a liquid inlet flow channel, a liquid return connecting part and a liquid return flow channel, one end of the liquid inlet flow channel is communicated with the first liquid inlet connecting part, the other end of the liquid inlet flow channel is communicated with the liquid return connecting part, one end of the liquid return flow channel is communicated with the liquid return connecting part, and the other end of the liquid return flow channel is communicated with the first liquid outlet connecting part;

the liquid inlet channel and the liquid return channel extend along a first direction and are distributed along a second direction, the liquid return connecting part extends along the second direction, and the first direction and the second direction are crossed;

at least two liquid cooling branches share one liquid return connecting part;

the utility model discloses a liquid cooling device, including first liquid cooling board, second liquid cooling channel and second liquid outlet connecting portion are equipped with in the second liquid cooling board, second liquid inlet connecting portion with second liquid cooling channel's both ends intercommunication respectively, just second liquid inlet connecting portion with first liquid outlet connecting portion intercommunication, wherein, the second liquid cooling channel includes two at least liquid cooling grooves of adjacent setting, the coolant liquid is at least two the flow direction in the liquid cooling groove is the same, at least two the liquid cooling groove is all followed first direction extends and follows the third direction and arranges, first direction with the third direction is alternately.

2. The battery module of claim 1, wherein at least two of the liquid-cooled branches are unequal in length.

3. The battery module according to claim 1, wherein the second liquid inlet connection portion includes a first sub liquid inlet connection portion and a second sub liquid inlet connection portion, the first sub liquid inlet connection portion and the second sub liquid inlet connection portion being respectively communicated with the first liquid cooling plates located at opposite sides of the cell assembly in the width direction;

the second liquid cooling channel comprises a first sub liquid cooling channel and a second sub liquid cooling channel, the first sub liquid cooling channel is communicated with the first sub liquid inlet connecting portion, the second sub liquid cooling channel is communicated with the second sub liquid inlet connecting portion, and the first sub liquid cooling channel and the second sub liquid cooling channel respectively comprise at least two liquid cooling grooves which are adjacently arranged.

4. The battery module of claim 1, wherein the liquid cooling assembly further comprises a first liquid inlet pipe, a second liquid inlet pipe and a liquid outlet pipe, the first liquid inlet pipe and the second liquid inlet pipe are respectively arranged on the first liquid cooling plate, and the first liquid inlet pipe and the second liquid inlet pipe are respectively communicated with the corresponding first liquid inlet connecting parts; the liquid outlet pipeline is arranged on the second liquid cooling plate and is communicated with the second liquid outlet connecting portion.

5. The battery module according to any one of claims 1 to 4, further comprising a heat radiating fin provided on the first liquid cooling plate, a module collecting and integrating member, a heat insulating sheet, an end plate, and a hanging hole site; the module collection integrated piece sets up the top surface of electric core subassembly, the thermal-insulated piece sets up electric core subassembly length direction's relative both sides, the end plate sets up corresponding the thermal-insulated piece is kept away from one side of electric core subassembly, the hoist and mount hole site sets up on the end plate.

6. A battery pack comprising the battery module according to any one of claims 1 to 5 and a case, in which the battery module is disposed.