CN219350364U - Heat abstractor and battery package for battery package - Google Patents

Abstract

The application provides a heat abstractor and battery package for provide the radiating effect that the battery was embraced. The heat dissipating device includes: a liquid-cooled frame; the liquid cooling frame is provided with a converging section bar and a heat exchange section bar; the two bus bars are oppositely arranged, and the bus bars extend along a first direction perpendicular to the thickness direction of the battery pack; the heat exchange section bar is connected between the two confluence section bars; the plurality of heat exchange profiles are distributed at intervals along the first direction; a battery cell group is arranged between every two adjacent heat exchange profiles; the converging section bar is provided with at least two chambers, wherein the chamber closer to the battery cell group is a converging chamber, and the chamber farther from the battery cell group is a heat insulation chamber; the heat exchange sections are respectively provided with a plurality of channels, part of the channels are heat exchange channels, and the other part of the channels are heat insulation channels; and two ends of the heat exchange channel are respectively communicated with the converging cavities of the two converging profiles.

Description

Heat abstractor and battery package for battery package

Technical Field

The application relates to the technical field of vehicles, in particular to a heat dissipation device for a battery pack and the battery pack.

Background

A power battery system is generally arranged in a new energy automobile such as an electric automobile, and a battery pack in the power battery system is used as a main electric energy supply device. With the continuous improvement of market demands of power battery systems, mileage anxiety of users on electric vehicles is more serious, and the solution of mileage anxiety in the current market adopts a battery pack to charge more rapidly, namely, charging time is reduced through larger charging multiplying power, and larger charging multiplying power can bring more heating value to a battery monomer, so that the heating value is too large to cause thermal runaway of the battery, thermal runaway of the battery monomer spreads, and finally, the whole pack fires. Therefore, how to improve the heat dissipation effect of the battery pack is a problem to be solved in the industry.

Disclosure of Invention

The application provides a heat dissipation device for a battery pack and the battery pack, and aims to solve one of the technical problems in the related art at least to a certain extent.

In a first aspect, embodiments of the present application provide a heat dissipating device for a battery pack, including: the liquid cooling frame, the liquid inlet pipe and the liquid outlet pipe; the liquid cooling frame is provided with a connected converging section bar and a heat exchange section bar; the two bus bars are oppositely arranged, and extend along a first direction; the first direction is perpendicular to the thickness direction of the battery pack; the heat exchange section bar is connected between the two converging section bars; the heat exchange profiles are multiple, and the multiple heat exchange profiles are distributed at intervals along the first direction; the accommodating space between every two adjacent heat exchange profiles is used for accommodating the battery cell group of the battery pack; the converging section bar is provided with at least two chambers, wherein the chamber closer to the accommodating space is a converging chamber, and the chamber farther from the accommodating space is a heat insulation chamber; one of the converging cavities of the converging section bar is communicated with the liquid inlet pipe, and the converging cavity of the other converging section bar is communicated with the liquid outlet pipe; the heat exchange sections are respectively provided with a plurality of channels, wherein part of the channels are heat exchange channels, and the other part of the channels are heat insulation channels; and two ends of the heat exchange channel are respectively communicated with the converging cavities of the two converging sectional materials.

In some embodiments, a portion of the heat exchange profile has the receiving space on opposite sides thereof; the heat exchange channels of the heat exchange profile are arranged towards the accommodating space on one side, and the heat insulation channels are arranged towards the accommodating space on the other side.

In some embodiments, in the heat exchange profile, the heat exchange channels have a plurality, and the plurality of heat exchange channels are stacked in the thickness direction.

In some embodiments, in each of the heat exchange profiles, the heat exchange channels are located on the same side.

In some embodiments, the heat exchange profile comprises: the heat insulation structure comprises a first section main body, wherein a first partition plate is arranged in the inner space of the first section main body and is parallel to the thickness direction, and the first partition plate is used for partitioning the inner space of the first section main body into a heat exchange channel and a heat insulation channel.

In some embodiments, a second partition plate is further disposed in the inner space of the first profile body, the second partition plate being disposed perpendicular to the first partition plate, the second partition plate being for partitioning the heat exchange channel into a plurality of heat exchange channels.

In some embodiments, a third partition plate is further disposed in the inner space of the first profile body, the third partition plate is disposed perpendicular to the first partition plate, the third partition plate is used for partitioning the heat insulation channel into a plurality of heat insulation channels, and orthographic projection of the third partition plate and the second partition plate on one surface of the first partition plate is coincident.

In some embodiments, the bus bar comprises: the inner space of the second section bar main body is provided with a fourth division plate which is parallel to the thickness direction and is used for dividing the inner space of the second section bar into a converging cavity and a heat insulation cavity; wherein, the both ends in thermal-insulated chamber are provided with the shutoff piece respectively.

In some embodiments, the liquid inlet pipe and the liquid outlet pipe are connected to the same end of the liquid cooling frame.

In a second aspect, an embodiment of the present application provides a battery pack, including: the battery cell unit and the heat dissipation device are arranged in the box body.

According to the heat dissipation device for the battery pack and the battery pack, the liquid cooling frame is provided with the converging section bar and the heat exchange section bar; the two bus bars are arranged oppositely, and the bus bars extend along the first direction; the first direction is perpendicular to the thickness direction of the battery pack; the heat exchange section bar is connected between the two confluence section bars; the heat exchange profiles are distributed at intervals along the first direction; the accommodating space between every two adjacent heat exchange profiles is used for accommodating the battery cell group of the battery pack; the busbar section is provided with at least two chambers, wherein the chamber closer to the battery cell group is a busbar chamber, and the chamber farther from the battery cell group is a heat insulation chamber; the converging cavity of one converging section bar is communicated with the liquid inlet pipe, and the converging cavity of the other converging section bar is communicated with the liquid outlet pipe; the heat exchange sections are respectively provided with a plurality of channels, part of the channels are heat exchange channels, and the other part of the channels are heat insulation channels; and two ends of the heat exchange channel are respectively communicated with the converging cavities of the two converging profiles. So, the heat transfer passageway in the liquid cooling frame and the great side heat transfer contact of battery cell free area in the electric core group, one of them chamber that converges of liquid cooling frame also can be with the free side heat transfer contact of battery cell for the free area of contact of battery cell and liquid cooling frame is great, has increased the free radiating area of battery cell, thereby improves the radiating effect of battery package, can satisfy the radiating requirement of battery package that has big ability density and high charge-discharge multiplying power. In addition, the heat insulation cavity and the heat insulation channel of the liquid cooling frame can be used as an air heat insulation layer to prevent the thermal runaway from spreading, and can also provide an energy absorption deformation space to prevent the liquid cooling frame from leaking due to collision or extrusion, so that the safety of the battery pack is ensured.

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

Drawings

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a battery pack according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a battery pack according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of FIG. 3 at A-A;

FIG. 5 is an enlarged schematic view of a portion C of FIG. 4;

FIG. 6 is a schematic cross-sectional view of FIG. 3 at B-B;

fig. 7 is a partially enlarged schematic view of the portion D in fig. 6.

Reference numerals illustrate:

1-a box body; 2-a battery cell group; 3-liquid cooling frame; 3 A-An accommodating space; 31-confluence section bar; 31 A-A confluence chamber; 31 b-insulating chamber; 311-a second profile body; 312-fourth separator plate; 313-stiffener; 32-heat exchange section bar; 32 a-heat exchange channels; 32 b-insulating tunnel; 321-a first profile body; 322-a first separator plate; 323-a second divider; 324-third separator plate; 4-a liquid inlet pipe; 5-liquid outlet pipe.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the related art, heat dissipation modes of a battery pack in a power battery system include liquid cooling, air cooling and phase change cooling. The liquid cooling mode is high in heat dissipation efficiency and easy to realize. The liquid cooling scheme commonly used sets up the liquid cooling board in the bottom of the box of battery package, and the free bottom of electric core and liquid cooling board surface contact heat transfer, and the inside liquid that flows of liquid cooling board can take battery package outside from the free heat of electric core, realizes heat dissipation cooling. However, with the improvement of the capacity density and the charge-discharge rate of the battery pack, the use condition of the battery pack is more and more complex, and the heat dissipation requirement is also more and more increased.

In order to overcome the technical problem, the embodiment of the application provides a battery pack, through set up the liquid cooling frame in the box of battery pack, set up a plurality of accommodating space that accept electric core group in the liquid cooling frame, and make the heat transfer passageway in the liquid cooling frame and the great side heat transfer contact of electric core free area in the electric core group, make electric core monomer and the contact area of liquid cooling frame also heat radiating area is great promptly, one of them chamber that converges of liquid cooling frame also can with the free side heat transfer contact of electric core, further increase the free heat radiating area of electric core, thereby improve the radiating effect of battery pack, can satisfy the radiating requirement of battery pack that has big ability density and high charge-discharge multiplying power.

The following describes the technical solution of the present application and how the technical solution of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.

In addition, other structures and functions of the battery pack according to the embodiments of the present application are known to those skilled in the art, and are not described herein for redundancy reduction.

For convenience of description, the thickness direction of the battery pack is taken as the up-down direction (or top-bottom direction) of the battery pack; the thickness direction of the battery pack is also the height direction of the battery cell unit. The first direction is taken as the length direction of the battery pack, namely the front-back direction of the battery pack, and a plurality of battery core monomers in the battery pack are also distributed along the first direction. The second direction is the width direction of the battery pack, i.e., the left-right direction of the battery pack. Of course, in other embodiments, the first direction may be the width direction of the battery pack, and the second direction may be the length direction of the battery pack.

Fig. 1 is a schematic perspective view of a battery pack according to an embodiment of the present disclosure; fig. 2 is an exploded view of a battery pack according to an embodiment of the present disclosure; fig. 3 is a top view of a battery pack according to an embodiment of the present application. In the drawings, an arrow Z is used to indicate an upper side (i.e., a thickness direction of the battery pack), an arrow Y is used to indicate a front side (i.e., a first direction), and an arrow X is used to indicate a right side (i.e., a second direction).

The embodiment of the application provides a battery PACK, and particularly can be a PACK battery PACK. The PACK is a technological process for assembling and packaging the battery, and the battery PACK manufactured by the PACK technology is a PACK battery PACK.

Referring to fig. 1 to 3, the battery pack may have a case 1, and a plurality of battery cells 2 are disposed in the case 1. The plurality of cell groups 2 are arranged along the first direction Y. Each of the battery cell groups 2 comprises one or more stacked battery cell monomers. When the battery cell group 2 includes a plurality of battery cell units, the plurality of battery cell units are stacked along the first direction Y.

A heat dissipation device for dissipating heat of the battery cell group 2 is further arranged in the box body 1. The heat dissipating device includes: liquid cooling frame 3, feed liquor pipe 4 and drain pipe 5. The liquid-cooled frame 3 has a converging profile 31 and a heat exchanging profile 32.

The bus bar sections 31 have two, two bus bar sections 31 are disposed opposite to each other, and the bus bar sections 31 are disposed to extend in a first direction Y perpendicular to a thickness direction Z of the battery pack. The extension distance of the bus bar 31 in the first direction Y may be set according to actual needs. Illustratively, the orthographic projection of each cell group 2 in the battery pack on the inner side surface of the bus bar profile 31 facing the cell group 2 is located on this inner side surface of the bus bar profile 31.

The bus bar 31 also extends in the thickness direction Z of the battery pack, and the extending distance of the bus bar 31 in the thickness direction Z may be set according to the size of the cell group 2 in the battery pack in the thickness direction Z of the battery pack. Illustratively, the extension distance of the bus bar 31 in the thickness direction Z is equal to the dimension of the battery cell group 2 in the thickness direction Z of the battery pack, or the extension distance of the bus bar 31 in the thickness direction Z is slightly greater than the dimension of the battery cell group 2 in the thickness direction Z of the battery pack.

The heat exchange profile 32 is connected between the two bus profiles 31; the heat exchange profiles 32 have a plurality of heat exchange profiles 32 spaced apart along the first direction Y. The receiving space 3a between every two adjacent heat exchange profiles 32 is used for receiving the cell group 2 of the battery pack.

The heat exchange profile 32 extends along the thickness direction Z of the battery pack, and the extending distance of the heat exchange profile 32 along the thickness direction Z can be set according to time requirements. Illustratively, the dimension of the heat exchange profile 32 battery pack along the thickness direction Z of the battery pack may be set according to the dimension of the battery cell group 2 along the thickness direction Z of the battery pack; for example, the dimension of the heat exchange profile 32 battery pack in the thickness direction Z of the battery pack may be equal to the dimension of the battery cell group 2 in the thickness direction Z of the battery pack. Alternatively, the dimension of the heat exchange profile 32 battery pack in the thickness direction Z of the battery pack may be set according to the dimension of the bus bar profile 31 in the thickness direction Z of the battery pack; for example, the dimension of the heat exchange profile 32 battery pack in the thickness direction Z of the battery pack may be slightly smaller than the extension distance of the bus bar profile 31 in the thickness direction Z.

The heat exchange profile 32 is also arranged extending in a second direction X, which is perpendicular to the first direction Y and the thickness direction Z, so that both ends of the heat exchange profile 32 can be connected with the two opposing bus profiles 31. Each adjacent two heat exchange profiles 32 and the corresponding parts of the converging profiles 31 at the two ends enclose a receiving space 3a. The shape of the accommodating space 3a can be matched with the shape of the battery cell group 2. For example, when the cell group 2 has a quadrangular shape, the housing space 3a has a substantially quadrangular shape.

The cell group 2 may have a quadrangular shape. The cell stack 2 may have opposite bottom, top and side surfaces. The bottom and top surfaces of the battery cell group 2 are perpendicular to the height direction thereof, namely, perpendicular to the thickness direction Z of the battery pack. The sides of the battery cell group 2 can be four, and the four sides are respectively connected between the bottom surface and the top surface. Wherein two sides of the four sides with relatively large areas, such as a front side and a rear side in the figure, respectively correspond to the surfaces of two adjacent heat exchange profiles 32; the other two sides of relatively small area correspond to the respective portions of the two busbar profiles 31.

Referring to fig. 6 to 7, the busbar profile 31 has at least two chambers, wherein the chamber closer to the cell group 2 is a busbar chamber 31a, and the chamber farther from the cell group 2 is a heat insulation chamber 31b. By way of example, the busbar 31 can be made of an aluminium alloy. The converging section bar 31 can adopt a vertical harmonica pipe structure, and particularly can adopt a multi-layer harmonica pipe, so that the strength of the converging section bar 31 can be ensured, and a converging cavity 31a and a heat insulation cavity 31b which are mutually independent can be formed.

The confluence cavity 31a of one confluence section bar 31 is communicated with the liquid inlet pipe 4, and the confluence cavity 31a of the other confluence section bar 31 is communicated with the liquid outlet pipe 5. In some examples, the liquid inlet pipe 4 and the liquid outlet pipe 5 may be located at the same end of the liquid cooling frame 3, such as a front end or a rear end; in other examples, the liquid inlet pipe 4 and the liquid outlet pipe 5 may be respectively located at two ends of the liquid cooling frame 3, for example, the liquid inlet pipe 4 is located at a front end of the liquid cooling frame 3, the liquid outlet pipe 5 is located at a rear end of the liquid cooling frame 3, or the liquid inlet pipe 4 is located at a rear end of the liquid cooling frame 3, and the liquid outlet pipe 5 is located at a front end of the liquid cooling frame 3.

It will be appreciated that when the battery pack provided in this embodiment is installed in a vehicle, the height positions of the liquid inlet pipe 4 and the liquid outlet pipe 5 of the battery pack on the vehicle may be the same, or the liquid inlet pipe 4 of the battery pack may be located above the liquid outlet pipe 5 so that the cooling liquid can flow downward under the action of its own weight. For example, when the thickness direction Z of the battery pack is parallel to the up-down direction of the vehicle, the height positions of the liquid inlet pipe 4 and the liquid outlet pipe 5 on the vehicle may be the same; when the thickness direction Z of the battery pack is perpendicular to the upper direction of the vehicle, the liquid inlet pipe 4 is located above the liquid outlet pipe 5 so that the cooling liquid can flow downward under the action of self gravity.

The converging cavity 31a of the converging section bar 31 connected with the liquid inlet pipe 4 is closer to the cell group 2, and the converging cavity 31a can exchange heat with one side surface of the cell group 2 with a relatively small area so as to take away heat generated in the working process of the cell group 2. Heat conducting members such as heat conducting silica gel can be arranged between the side surface of the converging section bar 31 which is closer to the connection with the liquid inlet pipe 4 in the electric core group 2 and the converging section bar 31, so that the heat exchange efficiency is improved.

The heat insulation cavity 31b far away from the battery cell group 2 is used as an air heat insulation layer, so that heat of the battery cell group 2 can be prevented from being transferred to the box body 1 and then be conducted to other areas, and an energy absorption deformation space can be provided under the conditions of collision or extrusion of a battery pack and the like, and leakage of cooling liquid in the liquid cooling frame 3 is avoided.

Referring to fig. 4 to 5, the heat exchange profiles 32 respectively have a plurality of channels, wherein a part of the channels are heat exchange channels 32a, and the other part of the channels are heat insulation channels 32b; both ends of the heat exchanging channel 32a are respectively communicated with the converging cavities 31a of the two converging profiles 31. By way of example, the heat exchange profile 32 may be made of an aluminum alloy. The heat exchange section bar 32 adopts a multi-layer harmonica pipe structure, so that the strength of the heat exchange section bar 32 can be ensured, and a heat insulation channel 32b and a heat exchange channel 32a which are mutually independent can be formed.

The cooling liquid entering the heat exchange channel 32a of the heat exchange section 32 exchanges heat with the side surface with the larger area of the battery cell group 2 to take away heat generated in the working process of the battery cell group 2. Heat conducting members such as heat conducting silica gel can be arranged between the side surface, which is closer to the heat exchange channel 32a, of the battery cell group 2 and the heat exchange section bar 32, so that the heat exchange efficiency is improved.

The heat insulation channel 32b can be used as an air heat insulation layer, so that heat of the battery cell group 2 can be prevented from spreading to the adjacent battery cell group 2, and a deformation space is provided when the battery cell group 2 bulges and extrudes the heat exchange profile 32, so that the cooling liquid in the heat exchange profile 32 is ensured not to leak.

In this embodiment, the cooling liquid enters the converging cavity 31a of one converging section bar 31 through the liquid inlet pipe 4, the cooling liquid enters the heat exchanging channels 32a of each heat exchanging section bar 32 respectively through the converging cavity 31a, exchanges heat with the battery cell group 2, and carries the heat of the battery cell group 2 into the converging cavity 31a of the other converging section bar 31, and enters the liquid outlet pipe 5 through the converging cavity 31a to be discharged to a specific position outside the battery pack, so as to realize heat dissipation of the battery cell group 2 in the battery pack. The cooling liquid can be water or other liquid capable of being cooled.

In the battery pack of this embodiment, the liquid cooling frame 3 can replace the horizontal longeron in traditional battery pack, ensures the inside mechanical properties of box 1 of battery pack, need not the inner space of extra duty box 1 for more electric core group 2 can be arranged to box 1, does benefit to the electric quantity that increases the battery pack. For the scheme that sets up liquid cooling board and the free bottom surface heat transfer contact of electric core in the box 1 bottom among the correlation technique, liquid cooling frame 3 in this embodiment can have great area of contact with electric core group 2, increases electric core group 2's heat radiating area, has promoted heat exchange efficiency to improve the radiating effect to the battery package. In addition, the heat insulation chamber 31b and the heat insulation channel 32b of the liquid cooling frame 3 can serve as an air heat insulation layer to prevent the heat from being spread out of control, can provide an energy absorption deformation space, prevent the liquid cooling frame 3 from leaking due to collision or extrusion, and ensure the safety of the battery pack.

In the battery pack provided by the embodiment, the liquid cooling frame 3 is arranged, and the liquid cooling frame 3 is provided with the converging section bar 31 and the heat exchange section bar 32; the number of the bus bar sections 31 is two, the two bus bar sections 31 are arranged oppositely, and the bus bar sections 31 are arranged in an extending manner along the first direction Y; the first direction Y is perpendicular to the thickness direction Z of the battery pack; the heat exchange profile 32 is connected between the two bus profiles 31; the plurality of heat exchange profiles 32 are arranged, and the plurality of heat exchange profiles 32 are distributed at intervals along the first direction Y; the accommodating space 3a between every two adjacent heat exchange profiles 32 is used for accommodating the battery cell group 2 of the battery pack; wherein, the converging section bar 31 has at least two chambers, wherein the chamber closer to the cell group 2 is a converging chamber 31a, and the chamber farther from the cell group 2 is a heat insulating chamber 31b; the converging cavity 31a of one converging section bar 31 is communicated with the liquid inlet pipe 4, and the converging cavity 31a of the other converging section bar 31 is communicated with the liquid outlet pipe 5; the heat exchange profiles 32 are respectively provided with a plurality of channels, wherein part of the channels are heat exchange channels 32a, and the other part of the channels are heat insulation channels 32b; both ends of the heat exchanging channel 32a are respectively communicated with the converging cavities 31a of the two converging profiles 31. So, the heat exchange channel 32a in the liquid cooling frame 3 is in heat exchange contact with the side surface of the battery cell unit in the battery cell group 2, and one of the converging cavities 31a of the liquid cooling frame 3 can also be in heat exchange contact with the side surface of the battery cell unit, so that the contact area between the battery cell unit and the liquid cooling frame 3 is large, the heat dissipation area of the battery cell unit is increased, the heat dissipation effect of the battery pack is improved, and the heat dissipation requirement of the battery pack with high capacity density and high charge-discharge multiplying power can be met.

With continued reference to fig. 1-5, in some embodiments, there is a portion of the heat exchange profile 32 having receiving spaces 3a on opposite sides thereof. The heat exchange channel 32a of the heat exchange section bar 32 is arranged towards the accommodating space 3a at one side of the heat exchange section bar so as to radiate heat of the battery cell group 2 in the accommodating space 3 a; the heat insulation channel 32b is arranged towards the accommodating space 3a at the other side, so that heat carried by cooling liquid in the heat exchange channel 32a after exchanging heat with the battery cell group 2 in the other accommodating space 3a is prevented from spreading to the battery cell group 2 in the accommodating space 3a close to the heat insulation channel 32 b.

For example, in the heat exchange profile 32, the heat exchange channels 32a are multiple, and the heat exchange channels 32a are stacked along the thickness direction Z, so as to slow down the flow speed of the cooling liquid in the heat exchange channels 32a, so that the cooling liquid can exchange heat with the battery cell group 2 more fully, and the heat dissipation of the battery cell group 2 is ensured to be uniform. In other examples, among the plurality of heat exchanging channels 32a, a part of the heat exchanging channels 32a may be disposed toward the receiving space 3a on one side thereof, and another part of the heat exchanging channels 32a may be disposed toward the receiving space 3a on the other side thereof.

In some examples, the heat exchange channels 32a are all located on the same side in each heat exchange profile 32. For example, the heat exchange channels 32a of each heat exchange profile 32 are located at a portion of the heat exchange profile 32 located on the front side, or the heat exchange channels 32a of each heat exchange profile 32 are located at a portion of the heat exchange profile 32 located on the rear side. Therefore, the heat exchange channels 32a in the heat dissipation frame can uniformly dissipate heat of the battery cell groups 2, and swelling of the battery cell groups 2 can be absorbed by the heat insulation layer.

As shown in fig. 4 and 5, in each cell group 2, the front side surface of the cell group 2 in the first direction Y is close to the heat insulation channel 32b of the heat exchange profile 32 on the front side, and the rear side surface of the cell group 2 is close to the heat exchange channel 32a of the heat exchange profile 32 on the rear side. Each of the battery cell groups 2 may include two battery cell monomers, so that a heat dissipation effect on the battery cell groups 2 can be ensured, and more battery cell groups 2 can be relatively distributed. In other embodiments, in a scenario with higher heat dissipation requirements, the battery cell group 2 may also include one battery cell, where one of the larger-area sides of each battery cell is capable of exchanging heat with the heat exchanging channel 32a of one heat exchanging profile 32.

In some embodiments, the heat exchange profile comprises: the first profile body 321, the first profile body 321 being substantially hollow quadrangular. The first partition plate 322 is disposed in the inner space of the first profile body 321, the first partition plate 322 is parallel to the thickness direction Z, the first partition plate 322 is further disposed along the second direction X, the first partition plate 322 is used for partitioning the inner space of the first profile body 321 into the heat exchange channel 32a and the heat insulation channel 32b which are independent of each other, and the first partition plate 322 can further improve the strength of the heat exchange profile 32.

In some examples, a second partition plate 323 is further disposed in the inner space of the first profile body 321, the second partition plate 323 is disposed perpendicular to the first partition plate 322, the second partition plate 323 extends in the second direction X and the second partition plate 323 also extends in the first direction Y, the second partition plate 323 is used to partition the heat exchange channel 32a into a plurality of mutually independent heat exchange channels, and the plurality of heat exchange channels 32a can be stacked in the second direction X. Wherein in a heat exchange profile 32, the second dividing plate 323 can have one or two; when the second partition plates 323 have two or more, the second partition plates 323 are spaced apart. The specific number of the second dividing plates 323 may be set according to actual needs. In addition, the second separator 323 can also increase the strength of the heat exchange profile 32.

In some examples, a third partition plate 324 is further provided in the inner space of the first profile body 321, the third partition plate 324 being provided perpendicular to the first partition plate 322, the third partition plate 324 serving to partition the heat insulation passage 32b into a plurality. The third separating plate 324 coincides with the orthographic projection of the second separating plate 323 on one of the surfaces of the first separating plate 322, i.e. the second and third separating plates 323, 324 are symmetrically arranged with respect to the first separating plate 322 to simplify the manufacturing process of the heat exchange profile 32. In addition, the third separation plate 324 also increases the strength of the heat exchange profile 32.

In other examples, the third partition plate 324 and the second partition plate 323 may be disposed in a staggered manner, that is, the orthographic projections of the third partition plate 324 and the second partition plate 323 on one surface of the first partition plate 322 are disposed in a staggered manner.

In this embodiment, the heat exchange profile 32 may be integrally formed by a rolling process, an extrusion process, a casting process, or the like, so as to improve the strength of the heat exchange profile 32, and avoid leakage of the cooling liquid of the heat exchange profile 32.

With continued reference to fig. 6-7, in some embodiments, the bus bar 31 includes: the second profile body 311, the second profile body 311 is substantially hollow quadrangular. The inner space of the second profile body 311 is provided with a fourth partition plate 312, the fourth partition plate 312 is provided to extend in the thickness direction Z of the battery pack, and the fourth partition plate 312 is provided to extend in the first direction Y, the fourth partition plate 312 being for partitioning the inner space of the second profile into a confluence chamber 31a and a heat insulation chamber 31b. The chamber closer to the heat exchange profile 32 is a confluence chamber 31a.

The surface of the second section main body 311 facing the heat exchange section 32 is provided with a liquid passing port, so that the cooling liquid in the converging cavity 31a of the second section main body 311 connected with the liquid inlet pipe 4 can respectively enter each heat exchange channel 32a through the liquid passing port, and the liquid after heat exchange with the battery cell group 2 in the heat exchange channels 32a can respectively enter the converging cavity 31a of the second section connected with the liquid outlet pipe 5 through the liquid passing port. In a second profile body 311, the number of the liquid passing openings is equal to the number of the heat exchanging channels 32a.

In addition, the sealing treatment is performed at the communication position between the confluence cavity 31a and the heat exchange channel 32a of the heat exchange profile 32, so that the leakage of the cooling liquid in the liquid cooling frame 3 is ensured.

The two ends of the heat insulation cavity 31b are respectively provided with a plugging piece so as to prevent cooling liquid from entering the heat insulation cavity 31b to influence the heat insulation cavity 31b to block heat spreading and absorb energy and deform. In some examples, the blocking member may be specifically an elastic member inserted into the insulating chamber 31b, the elastic member being inserted into the insulating chamber 31b and being capable of abutting against a chamber wall of the insulating chamber 31b. For example, the elastic member may have a first end and a second end, the first end of the elastic member is inserted into the heat insulation cavity 31b and the first end can abut against the cavity wall of the heat insulation cavity 31b, and the junction of the second end of the elastic member and the first end forms a step surface that can abut against a part of the end surface of the bus bar section 31 to ensure sealing reliability of the heat insulation cavity 31b. In other examples, the plugs may also be formed at the ports of the insulating chamber 31b for some process.

In some examples, a reinforcing plate 313 may be further provided in the inner space of the bus bar 31, the reinforcing plate 313 may be disposed perpendicular to the fourth partition plate 312, the reinforcing plate 313 may be disposed to extend in the first direction Y and the second direction X, and the reinforcing plate 313 may be connected to both the second bar body 311 and the fourth partition plate 312 to increase the strength of the bus bar 31. Wherein reinforcing plates 313 may be provided at opposite sides of the fourth separation plate 312, respectively.

It will be appreciated that: in the bus bar section 31 and the heat exchange section 32 in the above embodiments, for convenience in manufacturing, the structures of the above sections may be set according to actual needs, so long as the bus bar section 31 and the heat exchange section 32 can be ensured to respectively realize their corresponding functions.

The embodiment of the application also provides a heat dissipation device which can be used for a battery pack and can be also suitable for other devices with heat dissipation requirements. The structure, function and implementation process of the heat dissipating device may be the same as those of the heat dissipating device in the foregoing embodiments.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, as used in embodiments of the present application, 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 in the present embodiment. Thus, a feature of an embodiment described herein that is termed a "first," "second," etc., may explicitly or implicitly indicate that at least one such feature is included in the embodiment. In the description of the present application, the word "plurality" means at least two or more, for example, two, three, four, etc., unless explicitly defined otherwise in the embodiments.

In this application, unless explicitly stated or limited otherwise in the examples, the terms "mounted," "connected," and "fixed" as used in the examples should be interpreted broadly, e.g., the connection may be a fixed connection, may be a removable connection, or may be integral, and it may be understood that the connection may also be a mechanical connection, an electrical connection, etc.; of course, it may be directly connected, or indirectly connected through an intermediate medium, or may be in communication with each other, or in interaction with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art depending on the specific implementation.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A heat sink for a battery pack, comprising: the liquid cooling frame, the liquid inlet pipe and the liquid outlet pipe; the liquid cooling frame is provided with a connected converging section bar and a heat exchange section bar;

the two bus bars are oppositely arranged, and extend along a first direction; the first direction is perpendicular to the thickness direction of the battery pack;

the heat exchange section bar is connected between the two converging section bars; the heat exchange profiles are multiple, and the multiple heat exchange profiles are distributed at intervals along the first direction; the accommodating space between every two adjacent heat exchange profiles is used for accommodating the battery cell group of the battery pack;

the converging section bar is provided with at least two chambers, wherein the chamber closer to the accommodating space is a converging chamber, and the chamber farther from the accommodating space is a heat insulation chamber; one of the converging cavities of the converging section bar is communicated with the liquid inlet pipe, and the converging cavity of the other converging section bar is communicated with the liquid outlet pipe;

the heat exchange sections are respectively provided with a plurality of channels, wherein part of the channels are heat exchange channels, and the other part of the channels are heat insulation channels; and two ends of the heat exchange channel are respectively communicated with the converging cavities of the two converging sectional materials.

2. The heat sink of claim 1 wherein a portion of the heat exchange profile has the receiving space on opposite sides thereof;

the heat exchange channels of the heat exchange profile are arranged towards the accommodating space on one side, and the heat insulation channels are arranged towards the accommodating space on the other side.

3. The heat dissipating device according to claim 2, wherein in the heat exchanging profile, the heat exchanging channels have a plurality, and a plurality of the heat exchanging channels are stacked in the thickness direction.

4. The heat sink of claim 1 wherein the heat exchange channels are on the same side in each of the heat exchange profiles.

5. The heat sink of claim 1, wherein the heat exchange profile comprises: the heat insulation structure comprises a first section main body, wherein a first partition plate is arranged in the inner space of the first section main body and is parallel to the thickness direction, and the first partition plate is used for partitioning the inner space of the first section main body into a heat exchange channel and a heat insulation channel.

6. The heat sink according to claim 5, wherein a second partition plate is further provided in the inner space of the first profile body, the second partition plate being provided perpendicular to the first partition plate, the second partition plate being for partitioning the heat exchange passage into a plurality of.

7. The heat dissipating device according to claim 6, wherein a third partition plate is further provided in the inner space of the first profile body, the third partition plate being provided perpendicular to the first partition plate, the third partition plate being for partitioning the heat insulating passage into a plurality, and the third partition plate being coincident with an orthographic projection of the second partition plate on one of the surfaces of the first partition plate.

8. The heat sink according to any one of claims 1 to 7, wherein the bus bar profile comprises: the inner space of the second section bar main body is provided with a fourth division plate which is parallel to the thickness direction and is used for dividing the inner space of the second section bar into a converging cavity and a heat insulation cavity;

wherein, the both ends in thermal-insulated chamber are provided with the shutoff piece respectively.

9. The heat dissipating device of any one of claims 1 to 7, wherein the liquid inlet pipe and the liquid outlet pipe are connected to the same end of the liquid cooling frame.

10. A battery pack, comprising: the heat dissipating device according to any one of claims 1 to 9, a case, a battery cell, and a heat dissipating device provided in the case.

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