CN220914356U - Radiating assembly, battery pack and electric equipment - Google Patents

Abstract

The utility model discloses a heat dissipation assembly, a battery pack and electric equipment. The battery package is including the block terminal that has a plurality of surfaces, and this radiating component is used for the battery package, and radiating component includes the cold plate and is connected with the cold plate heat conduction spare, and cold plate and heat conduction spare are used for being connected with the different surfaces of block terminal respectively, from this, accessible cold plate and heat conduction spare and block terminal contact heat transfer to be favorable to promoting radiating component and block terminal area of contact, reinforcing radiating component is to the radiating effect of block terminal, and then be favorable to promoting the security and the life of battery package.

Description

Radiating assembly, battery pack and electric equipment

Technical Field

The utility model relates to the technical field of electric equipment, in particular to a heat dissipation assembly, a battery pack and electric equipment.

Background

In recent years, sales and market share of electric devices such as new energy automobiles, aircrafts, ships and the like using electric energy as a power source have been in a continuously strong growing situation.

As a battery pack for storing and discharging electric energy in an electric device, each part in the battery pack needs to be operated at a proper temperature, in the related art, a distribution box in the battery pack is usually placed on a cold plate and cooled by the cold plate, but the heat exchange efficiency of the distribution box and the cold plate is low, and the distribution box is easy to overheat to cause a safety problem.

Disclosure of utility model

The present utility model aims to solve, at least to some extent, one of the above technical problems in the prior art. Therefore, the utility model provides the heat radiation component for the battery pack, which can enhance the heat radiation effect of the heat radiation component on the distribution box.

The utility model further provides a battery pack with the heat dissipation assembly.

The utility model also provides electric equipment with the battery pack.

According to the heat dissipation assembly for a battery pack of the present utility model, the battery pack includes a distribution box having a plurality of surfaces, the heat dissipation assembly includes a cold plate and a heat conductive member connected to the cold plate, and the cold plate and the heat conductive member are used to be connected to different surfaces of the distribution box, respectively.

According to the heat radiation assembly provided by the embodiment of the utility model, the cold plate and the heat conduction piece are respectively connected with different surfaces of the distribution box, so that the contact area of the heat radiation assembly and the distribution box is favorably increased, the heat radiation effect of the heat radiation assembly on the distribution box is enhanced, and the safety and the service life of the battery pack are favorably improved.

According to some embodiments of the utility model, the cold plate is configured to be in thermally conductive connection with a first surface of the electrical box, the thermally conductive member is configured to be in thermally conductive connection with a second surface of the electrical box, and the thermally conductive member is further configured to be in thermally conductive connection with the cold plate; the first surface and the second surface are positioned opposite one another on the electrical box.

Further, the heat conducting member includes a first heat conducting portion and a second heat conducting portion that can transfer heat, the first heat conducting portion being connected to the cold plate, the second heat conducting portion being connected to the second surface.

Further, the heat conductive member further includes a connection portion connected between the first heat conductive portion and the second heat conductive portion.

Further, the connection portion is in heat conduction connection with the third surface of the distribution box.

According to some embodiments of the utility model, the heat conducting member defines a working fluid path therein, and the working fluid path is provided with a phase change working fluid therein.

Further, the working fluid flow path includes: the first heat conduction part is used for limiting the first heat conduction part to the first accommodating cavity, the second heat conduction part is used for limiting the second heat conduction part to the second accommodating cavity, the first connecting channel and the second connecting channel are limited by the connecting part, and the first connecting channel and the second connecting channel are communicated with the first accommodating cavity and the second accommodating cavity.

According to some embodiments of the utility model, a cooling flow path is defined in the cold plate, and a cooling medium is arranged in the cooling flow path.

Further, the cooling flow path is in communication with the working fluid flow path.

According to another aspect of the present utility model, a battery pack according to an embodiment includes: frame, electric core, block terminal and above-mentioned heat dissipation subassembly; the frame is connected with the cold plate and defines a mounting groove, the battery cell is arranged in the mounting groove, and the battery cell is in heat conduction connection with the cold plate.

According to the battery pack disclosed by the embodiment of the utility model, the cold plate and the heat conducting piece of the heat radiating component are respectively connected with different heating surfaces of the distribution box, so that the heat radiating effect of the heat radiating component on the distribution box is enhanced, and the reliability and the safety of the battery pack are improved.

According to some embodiments of the utility model, the area where the cold plate is connected to the electric core is a first connection area, the area where the cold plate is connected to the heat conducting member and the distribution box is a second connection area, and the cooling flow path in the cold plate includes a first flow path and a second flow path connected in parallel, where the first flow path corresponds to the first connection area, and the second flow path corresponds to the second connection area.

Further, the battery pack further includes: the division plate is arranged in the mounting groove and separates the distribution box from the battery cell.

Further, the battery pack further includes: and the radiator is communicated with the cooling flow path in the cold plate.

An electrically powered device according to an embodiment of the present utility model includes the above-described battery pack.

According to the electric equipment provided by the embodiment of the utility model, the cold plate and the heat conducting piece of the battery pack are respectively connected with different heating surfaces of the distribution box, so that the heat dissipation effect of the heat dissipation assembly on the distribution box is enhanced, and the reliability and the safety of the battery pack and the electric equipment are improved.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

Fig. 1 is an exploded view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a power distribution box and heat dissipation assembly in accordance with an embodiment of the utility model;

Fig. 3 is a partial schematic structure of a battery pack according to an embodiment of the present utility model.

Reference numerals:

The heat dissipation assembly 1, the cold plate 11, the heat conduction member 12, the first heat conduction portion 121, the second heat conduction portion 122, the connecting portion 123, the distribution box 2, the battery cell 3, the water inlet 4, the water outlet 5, the frame 6, the partition plate 7 and the battery pack 10.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The heat dissipation assembly 1, the battery pack 10, and the electric device according to the embodiment of the present utility model are described in detail below with reference to fig. 1 to 3.

Referring to fig. 1 to 3, a heat sink 1 according to an embodiment of the present utility model may be used for a battery pack 10, the battery pack 10 including a distribution box 2 having a plurality of surfaces, the heat sink 1 including a cold plate 11 and a heat conductive member 12 connected to the cold plate 11, the heat conductive member 12 being heat-exchangeable with the cold plate 11, the cold plate 11 being capable of conducting heat out of the interior of the battery pack 10.

The cold plate 11 and the heat conducting member 12 are used for being respectively connected with different surfaces of the distribution box 2 so as to improve the heat dissipation effect of the heat dissipation assembly 1 on the distribution box 2, and it can be understood that under the working conditions of charging the battery pack 10 and the like, the distribution box 2 works and generates heat, so that the outer surface of the distribution box 2 is heated to form a plurality of heating surfaces, the cold plate 11 and the heat conducting member 12 can be respectively connected with different surfaces of the distribution box 2, so that the heat generated by the distribution box 2 can be quickly led out by the cold plate 11 and the heat conducting member 12, that is, one part of the heat of the distribution box 2 can be conducted to the cold plate 11 by one surface in direct contact with the cold plate 11, and the other part of the heat of the distribution box 2 is conducted to the cold plate 11 by the other surface in contact with the heat conducting member 12 through the heat conducting member 12, thereby avoiding uneven temperature distribution and local overheating of the distribution box 2, and enhancing the heat dissipation effect of the heat dissipation assembly 1 on the distribution box 2.

According to the heat dissipation assembly 1 provided by the embodiment of the utility model, the cold plate 11 and the heat conduction piece 12 are respectively connected with different surfaces of the distribution box 2, so that the contact area of the heat dissipation assembly 1 and the distribution box 2 is favorably increased, the heat dissipation effect of the heat dissipation assembly 1 on the distribution box 2 is enhanced, and the safety and the service life of the battery pack 10 are favorably improved.

It should be noted that the surfaces of the distribution box 2 may be different portions of an arc-shaped surface, such as a spherical surface, a cylindrical surface, and the like, and the surfaces are not limited to flat surfaces.

In some embodiments of the present utility model, the cold plate 11 is used to be in heat-conducting connection with a first surface of the electric box 2, the heat conducting member 12 is used to be in heat-conducting connection with a second surface of the electric box 2, and the heat conducting member 12 is also in heat-conducting connection with the cold plate 11, the first surface and the second surface are opposite to each other on the electric box, it is understood that the plurality of surfaces of the electric box 2 include the first surface and the second surface, the first surface faces the cold plate 11 and is attached to the cold plate 11, the cold plate 11 can directly cool the first surface, the second surface is opposite to the first surface, the second surface is a side of the electric box 2 facing away from the cold plate 11, and heat at the second surface is difficult to be conducted to the first surface and the cold plate 11 through the electric box 2 itself.

In one embodiment of the present utility model, referring to fig. 2, the distribution box 2 is constructed in a rectangular parallelepiped shape, the distribution box 2 has first to sixth surfaces, wherein the first surface is a lower surface of the distribution box 2, the second surface is an upper surface of the distribution box 2, the third to sixth surfaces are side surfaces connecting the first surface and the second surface, heat of the first surface can be conducted to the cold plate 11 by direct contact with the cold plate 11, heat of the second surface can be conducted to the cold plate 11 through the heat conducting member 12, so that temperatures of the first surface and the second surface are substantially simultaneously lowered, and at the same time, heat of the third to sixth surfaces can be conducted to the first surface and the second surface through the distribution box 2 itself after the temperatures of the first surface and the second surface are lowered, so that efficient heat dissipation of the entire distribution box 2 by the heat dissipating assembly 1 is achieved.

In some embodiments of the present utility model, referring to fig. 2, the heat conducting member 12 includes a first heat conducting portion 121 and a second heat conducting portion 122 that can transfer heat, the first heat conducting portion 121 is connected to the cold plate 11, heat of the heat conducting member 12 can be transferred to the cold plate 11 through the first heat conducting portion 121 to dissipate heat of the heat conducting member 12, the second heat conducting portion 122 is connected to the second surface of the electric box 2, heat of the second surface of the electric box 2 can be transferred to the second heat conducting portion 122 to enhance the heat dissipation effect of the electric box 2, and meanwhile, heat can be transferred between the first heat conducting portion 121 and the second heat conducting portion 122 to transfer heat of the second heat conducting portion 122 to the cold plate 11 through the first heat conducting portion 121.

In some embodiments of the present utility model, referring to fig. 2, the heat conducting member 12 further includes a connection portion 123, wherein the connection portion 123 is connected between the first heat conducting portion 121 and the second heat conducting portion 122, and heat of the second heat conducting portion 122 can be transferred to the first heat conducting portion 121 through the connection portion 123, so as to reduce the temperature of the second heat conducting portion 122, thereby facilitating the improvement of the heat dissipation efficiency of the second heat conducting portion 122 to the second surface.

In some embodiments of the present utility model, referring to fig. 2, the connection portion 123 is in heat conduction connection with the third surface of the electrical box 2, so as to increase the contact area between the heat dissipation assembly 1 and the electrical box 2, and the heat of the third surface of the electrical box 2 is transferred to the connection portion 123 to dissipate the heat of the electrical box 2, so as to further improve the heat dissipation efficiency of the heat dissipation assembly 1 to the electrical box 2.

It will be appreciated that the plurality of surfaces of the electrical box 2 further includes a third surface, which may be a surface that is not coplanar with the first and second surfaces, and which may be contiguous with or spaced apart from at least one of the first and second surfaces.

In some embodiments of the present utility model, a working fluid flow path is defined in the heat conducting member 12, and a phase change working fluid is disposed in the working fluid flow path, so as to improve the heat conducting efficiency of the heat conducting member 12 through the phase change of the phase change working fluid, where the heat conducting member 12 may include a hollow metal housing, a working fluid flow path adapted to accommodate the phase change working fluid is defined in the metal housing, when the power distribution box 2 dissipates heat, a temperature of an end of the heat conducting member 12 near the power distribution box 2 is higher, a temperature of an end of the heat conducting member 12 near the cold plate 11 is lower, where the phase change working fluid at a side with a higher temperature can evaporate to absorb heat, and the phase change working fluid at a side with a lower temperature can condense to release heat, so that the heat conducting member 12 can rapidly guide the heat of the power distribution box 2 to the cold plate 11.

In some embodiments of the utility model, the working fluid flow path comprises: the first accommodation chamber defined by the first heat conduction portion 121, the second accommodation chamber defined by the second heat conduction portion 122, the first connection channel and the second connection channel defined by the connection portion 123 are all communicated with the first accommodation chamber and the second accommodation chamber, so that the phase change working medium circularly flows in the working medium flow path, and the heat conduction efficiency of the heat conduction member 12 is improved.

It can be appreciated that when the temperature of the second surface of the distribution box 2 increases, the phase-change working medium in the second accommodating cavity of the second heat conducting portion 122 is changed from a liquid state to a gaseous state, and can flow into the first accommodating cavity of the first heat conducting portion 121 through the first connecting channel and/or the second connecting channel, the gaseous phase-change working medium in the first accommodating cavity exchanges heat with the cold plate 11 through the first heat conducting portion 121, so that the gaseous phase-change working medium in the first accommodating cavity is changed into a liquid state by heat release, and the liquid phase-change working medium in the first accommodating cavity can flow back to the first accommodating cavity through the first connecting channel and/or the second connecting channel under the pushing of the gaseous phase-change working medium entering later, thereby, the phase-change working medium circularly flows in the heat conducting member 12 by utilizing the temperature difference generated by the first heat conducting portion 121 and the second heat conducting portion 122, and thus being beneficial to improving the heat conducting efficiency of the heat conducting member 12.

In some embodiments of the present utility model, referring to fig. 2, the first heat conductive part 121 is located below the second heat conductive part 122, the first connection passage has a first communication port connected with the first receiving chamber and a second communication port connected with the second receiving chamber, the second connection passage has a third communication port connected with the first receiving chamber and a fourth communication port connected with the second receiving chamber, wherein:

In the up-down direction, the height of the first communication port is higher than that of the third communication port, and the height of the second communication port is higher than that of the fourth communication port, so that gaseous phase-change media in the second containing cavity can enter the first connecting channel through the second communication port with higher height, liquid phase-change media in the first containing cavity can enter the second connecting channel through the third communication port with lower height, and therefore the gaseous phase-change media in the second containing cavity can flow to the first containing cavity through the first connecting channel, and the liquid phase-change media in the first containing cavity flow to the second containing cavity through the second connecting channel, so that the flow of the phase-change media in the working medium flow path is smooth.

In some embodiments of the present utility model, a cooling flow path is defined in the cold plate 11, and a cooling medium is disposed in the cooling flow path to enhance the heat exchanging capability of the cold plate 11 by the flow of the cooling medium in the cooling flow path.

In some embodiments of the present utility model, the cooling flow path is communicated with the working medium flow path, the cooling medium may be the same as the phase change working medium, and the cooling medium and the phase change working medium may flow between the cooling flow path and the working medium flow path, so as to improve the heat exchange efficiency of the heat conducting member 12 and the cold plate 11, thereby being beneficial to improving the heat dissipation effect of the heat dissipation assembly 1 on the distribution box 2.

In one embodiment of the present utility model, the cooling medium may be a two-phase cooling medium such as a refrigerant, so as to form a direct cooling heat dissipation system, thereby being beneficial to enhancing the heat exchange capability of the cold plate 11.

In another embodiment of the present utility model, the cooling medium may be a single-phase cooling medium such as glycol and water to form a liquid-cooled heat dissipation system, so as to reduce the pressure resistance and tightness requirements of the cooling flow path, and facilitate the production and manufacture of the cold plate 11.

Referring to fig. 1 to 3, a battery pack 10 according to another aspect of the present utility model includes: the frame 6, the electric core 3, the distribution box 2 and the heat dissipation component 1 of the above embodiment, the frame 6 is connected with the cold plate 11 and defines a mounting groove, the electric core 3 is arranged in the mounting groove, the electric core 3 is connected with the cold plate 11, the electric core 3 can dissipate heat through the cold plate 11, and meanwhile, the cold plate 11 can serve as a bottom shell of the battery pack 10 to protect electric components such as the electric core 3 and the distribution box 2 in the mounting groove.

According to the battery pack 10 of the embodiment of the utility model, the cold plate 11 and the heat conducting piece 12 of the heat radiation component 1 are respectively connected with different surfaces of the distribution box 2, so that the contact area of the heat radiation component 1 and the distribution box 2 is favorably improved, the heat radiation effect of the heat radiation component 1 on the distribution box 2 is enhanced, and the safety and the service life of the battery pack 10 are favorably improved.

It will be appreciated that the frame 6 may be configured as a rectangular frame tray structure, the cold plate 11 may be a single plate, the cold plate 11 is connected with the bottom of the frame 6 to form a mounting groove, the cold plate 11 integrates the function of the bottom shell of the battery pack 10, the integration level of the battery pack 10 is improved, the assembly space of the battery pack 10 is saved, the energy density of the battery pack 10 is increased, and when the battery pack 10 is used for a vehicle, the space of the battery pack 10 occupying the vehicle can be reduced.

In one embodiment of the present utility model, the battery cell 3 may be adhered to the cold plate 11 by a heat-conducting structural adhesive, and the heat-conducting structural adhesive may fill a gap between the battery cell 3 and the cold plate 11 to improve the heat exchange efficiency between the battery cell 3 and the cold plate 11.

In some embodiments of the present utility model, referring to fig. 3, the area where the cold plate 11 is connected to the electric core 3 is a first connection area, the area where the cold plate 11 is connected to the heat conducting member 12 and the electric core 3 is a second connection area, the cooling flow path in the cold plate 11 includes a first flow path and a second flow path connected in parallel, the first flow path corresponds to the first connection area, the second flow path corresponds to the second connection area, the cooling liquid in the first flow path can radiate heat from the electric core 3 corresponding to the first connection area, the cooling liquid in the second flow path can radiate heat from the electric core 3 corresponding to the second connection area, and the heat productivity of the electric core 3 and the electric core 2 have a certain difference in different working conditions, for example, when the battery pack 10 is charged, the electric core 3 is low in heat productivity of the electric core 2, and when the electric core 10 is discharged, the electric core 3 is high in the electric core 2 is low, and the electric core 3 and the electric core 2 is cooled respectively by arranging the first flow path and the second flow path connected in parallel, thereby the cold plate 11 can be cooled down to realize accurate temperature regulation and control of the electric core 2 and the heat dissipation of the electric core 3.

In some embodiments of the present utility model, referring to fig. 1, the battery pack 10 further includes: the division board 7, division board 7 locate the mounting groove in and separate block terminal 2 and electric core 3, and the reducible block terminal 2 of division board 7 takes place the heat exchange with electric core 3 through the air in the battery package 10, avoids heating each other between block terminal 2 and the electric core 3.

Referring to fig. 1, the partition plate 7 may be connected to the frame 6 and the cold plate 11, the partition plate 7 may divide the mounting groove into two relatively independent first sub-mounting grooves and second sub-mounting grooves, the electric core 3 is disposed in the first sub-mounting grooves, and the electric box 2 and the heat conducting member 12 are disposed in the second sub-mounting grooves, so as to reduce heat exchange between the electric box 2 and the electric core 3, and the partition plate 7 may further improve structural strength of the battery pack 10.

In some embodiments of the present utility model, the battery pack 10 further includes: and the radiator is communicated with a cooling flow path in the cold plate 11, and the cooling liquid in the cooling flow path can exchange heat with the external environment through the radiator so as to realize the adjustment of the temperature of the cooling liquid.

Referring to fig. 1, a cold plate 11 is provided with a water inlet 4 connected with one end of a cooling flow path and a water outlet 5 connected with the other end of the cooling flow path, wherein the water inlet 4 and the water outlet 5 are both communicated with a radiator, and the water inlet 4 and the water outlet 5 can be arranged on the same side of the cold plate 11 or on two sides of the cold plate 11 according to the arrangement of the battery cells 3 in the mounting groove.

In some embodiments of the present utility model, a plurality of battery cells 3 are disposed in the mounting groove, and the plurality of battery cells 3 may be connected through copper bars and connecting pieces to form a battery module, and the battery module is electrically connected with the distribution box 2, and the battery module may be a structure, a blade structure, or a soft package structure that meets the standards of VDA (Verbandder Automobilindustrie, german automobile industry association), or the like.

In some embodiments of the present utility model, the battery pack 10 further includes a low voltage system including a connection harness and a sampling system that can be used to detect parameters such as temperature, voltage, etc. of the battery module.

In other embodiments of the present utility model (not shown in the drawings), the battery pack 10 includes a housing, a housing defining a receiving chamber therein, a partition plate 7 disposed in the receiving chamber, the partition plate 7 dividing the receiving chamber into a cell 3 receiving chamber and a power distribution receiving chamber which are not communicated with each other, wherein the cell 3 is disposed in the cell 3 receiving chamber, and the cell 3 receiving chamber is filled with a cooling medium such as silicone oil or a fluorinated solution to form an immersed heat dissipation system, and the cold plate 11, the power distribution box 2 and the heat conducting member 12 are disposed in the power distribution receiving chamber.

The heat dissipation assembly 1 may be used for heat dissipation of the power distribution box 2 and the battery cell 3, and may also be used for heat preservation and heating of the power distribution box 2 and the battery cell 3.

An electrically powered device according to an embodiment of the present utility model includes the battery pack 10 of the above-described embodiment. For example, the electrically powered device may be a vehicle, an aircraft, a ship, or an energy storage device, among others.

According to the electric device provided by the embodiment of the utility model, the cold plate 11 and the heat conducting piece 12 of the battery pack 10 are respectively connected with different heating surfaces of the distribution box 2, so that the heat dissipation effect of the heat dissipation assembly 1 on the distribution box 2 is enhanced, and the reliability and the safety of the battery pack 10 and the electric device are improved.

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 utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, 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 utility model.

Claims (14)

1. A heat-dissipating assembly for a battery pack comprising an electrical box (2) having a plurality of surfaces, characterized in that the heat-dissipating assembly (1) comprises a cold plate (11) and a heat-conducting member (12) connected to the cold plate (11), and that the cold plate (11) and the heat-conducting member (12) are adapted to be connected to different ones of the surfaces of the electrical box (2), respectively.

2. The heat sink assembly according to claim 1, wherein the cold plate (11) is adapted to be in heat conductive connection with a first surface of the electrical box (2), the heat conducting member (12) is adapted to be in heat conductive connection with a second surface of the electrical box (2), and the heat conducting member (12) is further in heat conductive connection with the cold plate (11); the first surface and the second surface are located opposite to each other on the distribution box (2).

3. The heat sink assembly of claim 2 wherein the thermally conductive member (12) comprises a first thermally conductive portion (121) and a second thermally conductive portion (122) that are heat transferable, the first thermally conductive portion (121) being connected to the cold plate (11) and the second thermally conductive portion (122) being connected to the second surface.

4. A heat dissipating assembly according to claim 3, wherein the heat conducting member (12) further comprises a connecting portion (123), the connecting portion (123) being connected between the first heat conducting portion (121) and the second heat conducting portion (122).

5. The heat sink assembly of claim 4 wherein the connection (123) is in thermally conductive connection with a third surface of the electrical box (2).

6. The heat dissipating assembly of claim 4, wherein said thermally conductive member (12) defines a fluid path therein, said fluid path having a phase change fluid disposed therein.

7. The heat dissipation assembly of claim 6, wherein the working fluid flow path comprises: a first accommodating cavity defined by the first heat conducting part (121), a second accommodating cavity defined by the second heat conducting part (122), and a first connecting channel and a second connecting channel defined by the connecting part (123), wherein the first connecting channel and the second connecting channel are communicated with the first accommodating cavity and the second accommodating cavity.

8. A heat sink assembly according to claim 6 or 7, characterized in that the cold plate (11) defines a cooling flow path therein, in which cooling flow path a cooling medium is arranged.

9. The heat sink assembly of claim 8 wherein the cooling flow path is in communication with the working fluid flow path.

10. A battery pack, the battery pack comprising: -a frame (6), a cell (3), a distribution box (2), a heat dissipating assembly according to any of claims 1-9; the frame (6) is connected with the cold plate (11) and defines a mounting groove, the battery cell (3) is arranged in the mounting groove, and the battery cell (3) is in heat conduction connection with the cold plate (11).

11. The battery pack according to claim 10, wherein the area where the cold plate (11) is connected to the battery cell (3) is a first connection area, the area where the cold plate (11) is connected to the heat conductive member (12) and the distribution box (2) is a second connection area, and the cooling flow path in the cold plate (11) includes a first flow path and a second flow path connected in parallel, the first flow path corresponds to the first connection area, and the second flow path corresponds to the second connection area.

12. The battery pack of claim 10, wherein the battery pack further comprises: the separation plate (7) is arranged in the mounting groove and separates the distribution box (2) from the battery cell (3).

13. The battery pack of claim 10, wherein the battery pack further comprises: and a radiator which communicates with a cooling flow path in the cold plate (11).

14. An electrically powered device comprising a battery pack according to any one of claims 10-13.