CN218939816U - Battery thermal management device, battery pack and automobile - Google Patents

Abstract

The utility model discloses a battery thermal management device, a battery pack and an automobile. The battery module comprises a plurality of battery cells. The heat exchange assembly comprises at least one first heat exchange piece with a cavity inside, and each first heat exchange piece is arranged between two adjacent battery monomers in the plurality of battery monomers and is attached. The heat exchange assembly further comprises: and the second heat exchange piece is arranged on at least one side surface of the battery module along the width direction, or is arranged on the top of the battery module along the height direction. The second heat exchange piece comprises a cavity part and a pipeline part; the cavity part is communicated with each first heat exchange piece; the heat exchange medium is arranged in a sealed cavity formed by the cavity part and each first heat exchange piece. The pipe portion is attached to the cavity portion and independently provided, and is communicable with an external refrigerant supply member or an external heat medium supply member. The heat pipe structure formed by the first heat exchange pieces and the cavity parts can be well applied to a heat management device of a battery.

Description

Battery thermal management device, battery pack and automobile

Technical Field

The present utility model relates to the field of battery technologies, and in particular, to a battery thermal management device, a battery pack, and an automobile.

Background

The demand of the electric automobile is increasing nowadays, and people put forward higher requirements on the endurance mileage and the charging speed of the electric automobile. The lithium ion battery has the advantages of high energy density and high charge and discharge speed, and becomes the most main power battery for the electric automobile at the present stage.

However, the increase in charge and discharge speed and the increase in energy density make temperature management of the battery more difficult. Meanwhile, lithium batteries have extremely severe requirements for their operating temperatures. At an unsuitable temperature, the stability and charge-discharge performance of the lithium battery are degraded. Under the respective extreme conditions, the phenomena of battery failure, spontaneous combustion and the like can occur, and the personal and property safety of personnel in the cabin is threatened. Therefore, temperature management of lithium batteries is of great practical importance.

In order to reliably control the temperature distribution of the battery, scientific research and engineering personnel have conducted a great deal of research. Thermal management of batteries has undergone multiple iterations of air cooling, liquid cooling, refrigerant cooling, and the like. However, the above-mentioned thermal management scheme still has disadvantages in terms of heat exchange efficiency, temperature uniformity, complex structure, etc.

The heat pipe structure is a sealing structure with two ends respectively comprising an evaporation part and a condensation part, a cavity is formed in the sealing structure, and a heat exchange medium is arranged in the cavity. The evaporation part is arranged corresponding to the heat source, so that the heat exchange medium in the evaporation part absorbs the heat of the heat source. The condensing part is arranged corresponding to the position of the non-heat source; wherein the temperature at the non-heat source is lower than the temperature at the heat source. The heat exchange medium absorbs heat in the evaporation part to evaporate liquid fast, vapor flows to the condensation part under the power of heat diffusion, and the heat released by condensation in the condensation part becomes liquid, and the liquid flows back to the evaporation part, so that the heat pipe structure is circulated until the temperature of the evaporation part and the condensation part is equal, and the effect of high-efficiency cooling is realized. Therefore, the heat pipe structure has the advantages of simple structure and high heat exchange efficiency, and is very suitable for a heat management system of a battery. The prior study also proves that the heat pipe cooling can effectively improve the temperature uniformity of the power battery pack. However, as the temperature difference between the evaporating portion and the condensing portion decreases during the cooling process of the heat pipe, the heat exchange speed of the heat pipe structure is continuously reduced, and the heat pipe structure cannot continue to be cooled after the evaporating portion and the condensing portion exchange heat until the temperatures are equal, so that the heat pipe structure is difficult to be practically applied to the heat management system of the power battery due to the cooling limit and the limitation of the heat exchange speed.

Therefore, the heat pipe structure of the related art has a problem in that it is difficult to practically apply to the heat management device of the battery.

Disclosure of Invention

The utility model aims to solve the problem that the heat pipe structure in the prior art is difficult to be practically applied to a heat management device of a battery.

In order to solve the above problems, an embodiment of the present utility model provides a thermal management device for a battery, which includes a battery module and a heat exchange assembly for performing a heat exchange function on the battery module.

The battery module comprises a plurality of battery cells which are arranged at intervals along the length direction of the thermal management device. The heat exchange assembly comprises at least one first heat exchange piece with a cavity structure inside, and each first heat exchange piece in the at least one first heat exchange piece is arranged between two adjacent battery monomers in the plurality of battery monomers and is attached to the side surfaces of the battery monomers on two sides of the heat exchange assembly. The heat exchange assembly further comprises: and the second heat exchange piece is arranged on at least one side surface of the battery module along the width direction of the thermal management device, or is arranged on the top of the battery module along the height direction of the thermal management device.

The second heat exchange piece comprises a cavity part and a pipeline part; the cavity part is of a cavity structure and is communicated with each first heat exchange piece; the heat exchange medium is arranged in a sealed cavity formed by the cavity part and each first heat exchange piece and can circularly flow between the cavity part and each first heat exchange piece.

The pipeline part is attached to the side surface of the cavity part, which is far away from each first heat exchange piece, and is arranged independently of the cavity part; the pipe portion may communicate with an external coolant supply member or an external heat medium supply member to supply the external coolant or the external heat medium to the pipe portion.

When the pipeline part is communicated with the external refrigerant supply part, the heat exchange medium in each first heat exchange part can absorb the heat of the battery monomers at two sides, then evaporate and flow into the cavity part of the second heat exchange part, and the heat exchange medium in the cavity part is condensed and radiated through heat transfer with the external refrigerant in the pipeline part and flows back into each first heat exchange part;

when the pipeline part is communicated with the external heat medium supply part, the heat exchange medium in the cavity part of the second heat exchange part absorbs heat of the external heat medium in the pipeline part, evaporates and flows into the first heat exchange parts, and condenses and dissipates heat in the first heat exchange parts through heat transfer between the battery monomers at two sides of the first heat exchange parts, and flows back into the cavity part.

By adopting the technical scheme, the cavity parts of the first heat exchange pieces and the second heat exchange pieces form a sealed cavity, and a heat exchange medium is arranged in the sealed cavity, so that the cavity parts of the first heat exchange pieces and the second heat exchange pieces form a heat pipe structure. Therefore, when the pipe portion of the second heat exchange member is communicated with the external refrigerant supply member, each first heat exchange member serves as an evaporation portion, the cavity portion of the second heat exchange member serves as a condensation portion, the heat exchange medium inside each first heat exchange member absorbs the heat of the battery cells on both sides of the heat exchange medium and evaporates to become a gas state, the gas state flows into the cavity portion of the second heat exchange member, condensation and heat dissipation are carried out in the cavity portion through heat transfer with the external refrigerant in the pipe portion to become a liquid state, and the liquid state flows back into the first heat exchange members to carry out heat re-circulation transfer so as to cool the battery module. In this process, the external refrigerant is continuously supplied to the pipe portion of the second heat exchange member by the external refrigerant supply part, so that the heat exchange medium in the cavity portion of the second heat exchange member continuously dissipates heat through the external refrigerant in the pipe portion, and the heat exchange medium in the cavity portion of the second heat exchange member serving as the condensing portion continuously absorbs the heat of the heat exchange medium in each first heat exchange member serving as the evaporating portion, and compared with the sealed heat pipe structure consisting of only the evaporating portion and the condensing portion in the prior art, the heat exchange assembly of the utility model has the advantages that the temperature of the heat exchange medium in the cavity portion of the second heat exchange member serving as the condensing portion is continuously far lower than the temperature of the heat exchange medium in each first heat exchange member serving as the evaporating portion, that is, the temperature difference between the condensing portion and the evaporating portion of the heat exchange assembly of the utility model is not reduced, and the heat exchange speed of the heat exchange assembly is not reduced, so that the heat exchange assembly does not have a cooling limit. And, because the cavity portion of each first heat exchange piece and second heat exchange piece of heat exchange assembly has formed the heat pipe structure for the heat exchange assembly who is applied to in the heat management device of battery has heat exchange efficiency height, advantage that the samming nature is good.

When the pipe portion of the second heat exchange member is connected to the external heat medium supply member, each of the first heat exchange members serves as a condensing portion, the hollow portion of the second heat exchange member serves as an evaporating portion, and the heat exchange medium in the hollow portion of the second heat exchange member absorbs the heat of the external heat medium in the pipe portion and evaporates to become gas, and flows into each of the first heat exchange members, and then condenses and dissipates heat in each of the first heat exchange members by heat transfer between the battery cells on both sides thereof to become liquid, and then flows back into the hollow portion to perform heat recirculation transfer. In the process, the external heat medium supply part continuously supplies external heat medium to the pipeline part of the second heat exchange piece, so that the heat exchange medium in the cavity part of the second heat exchange piece can continuously absorb heat through the external heat medium in the pipeline part, and further, the heat exchange medium in the cavity part of the second heat exchange piece serving as an evaporation part can continuously supply heat to the heat exchange medium in each first heat exchange piece serving as a condensation part, and the heat exchange assembly further has a heating function of the battery module.

According to another embodiment of the utility model, when the second heat exchange member is disposed on at least one side of the battery module along the width direction of the heat exchange device, each first heat exchange member is respectively provided with a first opening and a second opening at two ends of the heat exchange member along the width direction of the heat exchange device along the height direction of the heat exchange device, and the position of the second opening is higher than that of the first opening.

When the second heat exchange pieces are arranged on the top of the battery module in the height direction of the heat management device, the first openings and the second openings are respectively arranged on the top of each first heat exchange piece in the height direction of the heat management device.

A third opening is arranged on the cavity part of the second heat exchange piece at a position corresponding to the second opening of each first heat exchange piece, and the second opening is communicated with the third opening; the cavity part is provided with a fourth opening at a position corresponding to the first opening of each first heat exchange piece, and the first opening is communicated with the fourth opening.

By adopting the technical scheme, the heat exchange medium can be exchanged between the cavity parts of the first heat exchange piece and the second heat exchange piece only through the first opening and the fourth opening and the second opening and the third opening, so that the heat exchange efficiency of the heat management device of the battery is further improved after the heat exchange between the heat exchange medium inside the first heat exchange piece and the battery monomers at two sides of the heat exchange medium and the heat exchange between the heat exchange medium inside the cavity part of the second heat exchange piece and the external refrigerant or the external heat exchange medium in the pipeline part of the second heat exchange piece is more sufficient.

According to another embodiment of the utility model, the second heat exchange members are of plate-shaped structures, the side surfaces, far away from the first heat exchange members, of the cavity parts of the second heat exchange members are provided with pipeline cavities in a fitting mode, and the heat exchange pipes are arranged in the pipeline cavities to form pipeline parts.

By adopting the technical scheme, the heat exchange tube is arranged in the pipeline cavity, so that heat exchange between the external refrigerant or the external heat medium in the heat exchange tube and the external air can be reduced, thereby reducing heat loss of the pipeline part of the second heat exchange member, enabling heat of the external refrigerant or the external heat medium in the heat exchange tube of the pipeline part to exchange heat with the heat exchange medium in the cavity part of the second heat exchange member as much as possible, and further improving the heat exchange efficiency of the heat management device of the battery.

According to another embodiment of the utility model, the second heat exchange member is provided with a pipe joint along at least one side of the length direction of the heat exchange member, one end of the pipe joint is communicated with a heat exchange pipe in the pipe portion, the other end of the pipe joint is provided with an inlet interface and/or an outlet interface for connecting one end of an external pipeline, and the other end of the external pipeline can be connected with an external refrigerant supply component or an external heat medium supply component.

By adopting the technical scheme, the external pipeline connected with the external refrigerant supply component or the external heating medium supply component is convenient to connect with the heat exchange pipe in the pipeline part of the second heat exchange component, so that the convenience of the installation of the heat management device of the battery is improved.

According to another embodiment of the utility model, the heat management device of the battery is disclosed, and a plurality of reinforcing ribs are arranged on the side surface, close to each first heat exchange piece, and the side surface, far from each first heat exchange piece, of the cavity part in a staggered mode.

By adopting the technical scheme, the structural strength of the cavity part can be improved due to the arrangement of the reinforcing ribs in the cavity part, and the heat exchange medium in the cavity part can be blocked to a certain extent, so that the flow speed of the heat exchange medium in the cavity part is reduced, and the heat exchange between the heat exchange medium in the cavity part of the second heat exchange piece and the external refrigerant or the external heat medium in the pipeline part of the second heat exchange piece is more sufficient, so that the heat exchange efficiency of the heat management device of the battery is further improved.

According to another embodiment of the utility model, the first heat exchange member is provided with a plate-shaped structure, and fins which are arranged in a staggered manner are respectively arranged on two side surfaces of the first heat exchange member along the length direction of the heat exchange member.

By adopting the technical scheme, the first heat exchange pieces are arranged into the plate-shaped structures, so that the bonding degree between each first heat exchange piece and the battery monomers at the two sides of the first heat exchange piece can be improved, the heat exchange area between the heat exchange medium inside each first heat exchange piece and the battery monomers at the two sides of the heat exchange medium is improved, and the heat exchange efficiency is improved. The arrangement of the fins in the first heat exchange piece can improve the structural strength of the first heat exchange piece, and can play a certain blocking role on the heat exchange medium in the first heat exchange piece so as to reduce the flow speed of the heat exchange medium in the first heat exchange piece, so that the heat exchange between the heat exchange medium in each first heat exchange piece and the battery monomers on two sides of the heat exchange medium is more sufficient, and the heat exchange efficiency of the heat management device of the battery is further improved.

According to another embodiment of the utility model, the heat management device of the battery is disclosed, wherein a baffle plate is respectively arranged in a position between every two adjacent first heat exchange pieces in the cavity part of each second heat exchange piece, so that a plurality of mutually sealed sub-cavities are formed in the cavity part of each second heat exchange piece, and each sub-cavity is communicated with the corresponding first heat exchange piece. Heat exchange media are arranged in sealed cavities formed between the sub-cavities and the corresponding first heat exchange pieces, and the heat exchange media can circularly flow between the sub-cavities and the corresponding first heat exchange pieces.

By adopting the technical scheme, each subcavity and the corresponding first heat exchange piece respectively form a subcavity structure in the setting mode, and heat exchange media are respectively arranged in each subcavity structure, so that the cavity part of the second heat exchange piece and the heat exchange media in each first heat exchange piece are distributed more uniformly, and the temperature uniformity of the heat exchange assembly of the heat management device of the battery is improved.

According to another embodiment of the utility model, the embodiment of the utility model discloses a battery thermal management device, and the cavity part of the second heat exchange piece and the first heat exchange piece are integrally formed.

By adopting the technical scheme, the arrangement mode ensures the tightness between the cavity part of the second heat exchange piece and the first heat exchange piece, and meanwhile, the connecting piece is also prevented from being arranged between the cavity part of the second heat exchange piece and the first heat exchange piece, so that the structure of the cavity part of the second heat exchange piece and the first heat exchange piece is simpler.

The embodiment of the utility model also discloses a battery pack, which comprises the thermal management device of any battery.

By adopting the technical scheme, when the pipeline part of the second heat exchange member of the battery thermal management device of the battery pack is connected with the external refrigerant supply part, the external refrigerant supply part continuously supplies the external refrigerant to the pipeline part of the second heat exchange member, so that the heat exchange medium in the cavity part of the second heat exchange member can continuously radiate heat through the external refrigerant in the pipeline part, and further the heat exchange medium in the cavity part of the second heat exchange member serving as a condensing part can continuously absorb the heat absorbed by the battery monomers at the two sides of each first heat exchange member serving as an evaporating part, so that the temperature difference between the condensing part and the evaporating part of the heat exchange assembly is not reduced, the heat exchange speed of the heat exchange assembly is not reduced, and the cooling limit of the heat exchange assembly is not existed. And, because the cavity portion of each first heat exchange piece and second heat exchange piece of heat exchange assembly has formed the heat pipe structure for the heat exchange assembly who is applied to in the heat management device of battery has heat exchange efficiency height, advantage that the samming nature is good. In addition, when the battery pack needs to be heated, the external heat medium supply component continuously supplies external heat medium to the pipeline part of the second heat exchange piece, so that the heat exchange medium in the cavity part of the second heat exchange piece can continuously absorb heat through the external heat medium in the pipeline part, and further the heat exchange medium in the cavity part of the second heat exchange piece serving as the evaporation part can continuously supply heat to the heat exchange medium in each first heat exchange piece serving as the condensation part, and further heat is supplied to battery monomers at two sides of the first heat exchange piece through the heat exchange medium in each first heat exchange piece, so that the battery pack is heated.

The embodiment of the utility model also discloses an automobile comprising the battery pack.

By adopting the technical scheme, when the battery pack of the automobile needs to be cooled, the cooling process of the battery pack can be completed through the thermal management device of the battery of the automobile, and when the battery pack of the automobile needs to be heated, the heating process of the battery pack can be completed through the thermal management device of the battery of the automobile, so that the cold and hot requirements of the battery pack of the automobile under different working conditions can be met. In addition, the heat management device of the battery pack of the automobile comprises a heat pipe structure formed by the cavity parts of the first heat exchange piece and the second heat exchange piece, so the heat management device of the battery pack of the automobile has the advantages of high heat exchange efficiency and good temperature uniformity.

The beneficial effects of the utility model are as follows:

the utility model provides a battery thermal management device, which comprises a battery module and a heat exchange assembly for performing a heat exchange function on the battery module. The battery module comprises a plurality of battery cells. The heat exchange assembly includes at least one first heat exchange member whose interior is a cavity structure, and further includes: and the second heat exchange piece is arranged on at least one side surface of the battery module along the width direction of the thermal management device, or is arranged on the top of the battery module along the height direction of the thermal management device. The second heat exchange member includes a cavity portion and a pipe portion. The cavity parts of the first heat exchange pieces and the second heat exchange pieces form a sealed cavity, and heat exchange media are arranged in the sealed cavity, so that the cavity parts of the first heat exchange pieces and the second heat exchange pieces form a heat pipe structure. Therefore, when the pipe portion of the second heat exchange member is communicated with the external refrigerant supply member, each first heat exchange member serves as an evaporation portion, the cavity portion of the second heat exchange member serves as a condensation portion, the heat exchange medium inside each first heat exchange member absorbs the heat of the battery cells on both sides of the heat exchange medium and evaporates to become a gas state, the gas state flows into the cavity portion of the second heat exchange member, condensation and heat dissipation are carried out in the cavity portion through heat transfer with the external refrigerant in the pipe portion to become a liquid state, and the liquid state flows back into the first heat exchange members to carry out heat re-circulation transfer so as to cool the battery module. In this process, the external refrigerant is continuously supplied to the pipe portion of the second heat exchange member by the external refrigerant supply part, so that the heat exchange medium in the cavity portion of the second heat exchange member continuously dissipates heat through the external refrigerant in the pipe portion, and the heat exchange medium in the cavity portion of the second heat exchange member serving as the condensing portion continuously absorbs the heat of the heat exchange medium in each first heat exchange member serving as the evaporating portion, and compared with the sealed heat pipe structure consisting of only the evaporating portion and the condensing portion in the prior art, the heat exchange assembly of the utility model has the advantages that the temperature of the heat exchange medium in the cavity portion of the second heat exchange member serving as the condensing portion is continuously far lower than the temperature of the heat exchange medium in each first heat exchange member serving as the evaporating portion, that is, the temperature difference between the condensing portion and the evaporating portion of the heat exchange assembly of the utility model is not reduced, and the heat exchange speed of the heat exchange assembly is not reduced, so that the heat exchange assembly does not have a cooling limit. And, because the cavity portion of each first heat exchange piece and second heat exchange piece of heat exchange assembly has formed the heat pipe structure for the heat exchange assembly who is applied to in the heat management device of battery has heat exchange efficiency height, advantage that the samming nature is good.

When the pipe portion of the second heat exchange member is connected to the external heat medium supply member, each of the first heat exchange members serves as a condensing portion, the hollow portion of the second heat exchange member serves as an evaporating portion, and the heat exchange medium in the hollow portion of the second heat exchange member absorbs the heat of the external heat medium in the pipe portion and evaporates to become gas, and flows into each of the first heat exchange members, and then condenses and dissipates heat in each of the first heat exchange members by heat transfer between the battery cells on both sides thereof to become liquid, and then flows back into the hollow portion to perform heat recirculation transfer. In the process, the external heat medium supply part continuously supplies external heat medium to the pipeline part of the second heat exchange piece, so that the heat exchange medium in the cavity part of the second heat exchange piece can continuously absorb heat through the external heat medium in the pipeline part, and further, the heat exchange medium in the cavity part of the second heat exchange piece serving as an evaporation part can continuously supply heat to the heat exchange medium in each first heat exchange piece serving as a condensation part, and the heat exchange assembly further has a heating function of the battery module.

Additional features and corresponding advantages of the utility model will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural diagram of a thermal management device for a battery according to embodiment 1 of the present utility model;

fig. 2 is a schematic structural diagram of a first heat exchange member of a thermal management device for a battery according to embodiment 1 of the present utility model;

fig. 3 is a schematic view of the internal structure of a first heat exchange member of the thermal management device for a battery according to embodiment 1 of the present utility model;

fig. 4 is a schematic structural diagram of a second heat exchange member of the thermal management device for a battery according to embodiment 1 of the present utility model;

fig. 5 is a schematic diagram of the internal structure of a second heat exchange member of the thermal management device for a battery according to embodiment 1 of the present utility model;

FIG. 6 is a schematic diagram illustrating a flow of a medium in a cooling state of a thermal management device for a battery according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram illustrating a flow of a medium in a heated state of a thermal management device of a battery according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a thermal management device for a battery according to embodiment 2 of the present utility model;

fig. 9 is a schematic structural diagram of a heat exchange assembly of a thermal management device for a battery according to embodiment 2 of the present utility model.

Reference numerals illustrate:

10: a battery module; 110: a battery cell;

20: a heat exchange assembly;

210: a first heat exchange member; 211: a first opening; 212: a second opening; 213: a fin;

220: a second heat exchange member;

221: a cavity portion; 2211: a third opening; 2212: a fourth opening; 2213: reinforcing ribs; 2214: a baffle plate;

222: a pipe section; 2221: a pipe cavity; 2222: a heat exchange tube;

223: a pipe joint;

d: the length direction of the thermal management device;

e: the width direction of the thermal management device;

f: the height direction of the thermal management device.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Example 1

The embodiment provides a thermal management device for a battery, as shown in fig. 1, which comprises a battery module 10 and a heat exchange assembly 20 for performing a heat exchange function on the battery module 10.

As shown in fig. 1, the battery module 10 includes a plurality of battery cells 110 spaced apart in the longitudinal direction D of the thermal management device. As shown in fig. 1 to 3, the heat exchange assembly 20 includes at least one first heat exchange member 210 having a cavity structure inside, and each first heat exchange member 210 of the at least one first heat exchange member 210 is disposed between two adjacent battery cells 110 of the plurality of battery cells 110 and is attached to the sides of the battery cells 110 on two sides thereof. Specifically, the number of the battery cells 110 may be two, three, six, ten, etc., and the number of the first heat exchanging members 210 is matched with the number of the battery cells 110, so that each battery cell 110 is provided with the first heat exchanging member 210 along at least one side of the length direction D of the thermal management device. In addition, the number of the battery cells 110 may be set to one, and in this case, the number of the first heat exchanging members 210 may be set to one, and one first heat exchanging member 210 is disposed at one side of one battery cell 110 along the length direction D of the thermal management device; the number of the first heat exchanging members 210 may be two, and the two first heat exchanging members 210 are respectively disposed at two sides of one battery cell 110 along the length direction D of the thermal management device.

More specifically, the first heat exchange member 210 may be configured as a tubular structure, and the first heat exchange member 210 of the tubular structure is spirally disposed around the side surface of each battery cell 110 along the length direction D of the thermal management device, so that the first heat exchange member 210 of the tubular structure can cover as many side surfaces of each battery cell 110 along the length direction D of the thermal management device as possible. The first heat exchange member 210 may also be provided in a plate-shaped structure, and the first heat exchange member 210 of the plate-shaped structure covers the side surfaces of the respective battery cells 110 in the length direction D of the thermal management device. Preferably, the coverage rate of the first heat exchange member 210 of the plate-shaped structure to the side surface of each battery cell 110 along the length direction D of the thermal management device is higher, so that the heat exchange between the heat exchange medium inside each first heat exchange member 210 and the battery cells 110 at both sides thereof is more sufficient, so as to improve the heat exchange efficiency of the thermal management device of the battery, and the first heat exchange member 210 in the embodiment is configured as a plate-shaped structure. The battery cell 110 may have a rectangular parallelepiped, square, prism, or the like. The first heat exchange member 210 may be attached to the side surface of the battery unit 110 along the length direction D of the thermal management device by means of clamping, welding, or the like, or may be attached to the side surface of the battery unit 110 along the length direction D of the thermal management device by means of an embedding manner, which may be specifically determined according to the actual design, and this embodiment is not limited thereto specifically.

As shown in fig. 1, 4 and 5, the heat exchange assembly 20 further includes a second heat exchange member 220 provided on at least one side of the battery module 10 in the width direction E of the thermal management device. Specifically, the heat exchange assembly 20 may include one second heat exchange member 220, and one second heat exchange member 220 is disposed on one of the sides of the battery module 10 in the width direction E of the thermal management device; the heat exchange assembly 20 may include two second heat exchange members 220, and the two second heat exchange members 220 are disposed on both sides of the battery module 10 in the width direction E of the thermal management device, respectively.

The second heat exchange member 220 includes a cavity portion 221 and a pipe portion 222; the cavity 221 has a cavity structure, and the cavity 221 is communicated with each first heat exchange member 210; the heat exchange medium is disposed in the sealed cavity formed by the cavity 221 and each first heat exchange element 210, and can circulate between the cavity 221 and each first heat exchange element 210. The cavity 221 of the second heat exchanger 220 and each of the first heat exchangers 210 may be connected by welding, bonding, or the like, or may be integrally formed, and preferably, in order to improve the sealing property between the cavity 221 and each of the first heat exchangers 210, the cavity 221 and each of the first heat exchangers 210 in this embodiment are integrally formed. In addition, the side surfaces of each first heat exchange member 210 connected to the cavity portion 221 of the second heat exchange member 220 may be integrally communicated such that each first heat exchange member 210 communicates with the cavity portion 221; an opening may also be provided on a side surface of each first heat exchange member 210 connected to the cavity portion 221 of the second heat exchange member 220, so that each first heat exchange member 210 is communicated with the cavity portion 221 through the opening, which may be described later, and will not be described herein.

The pipe portion 222 is attached to the side surface of the cavity portion 221 away from each first heat exchanger 210, and is provided independently of the cavity portion 221; the pipe portion 222 may communicate with an external coolant supply member or an external heat medium supply member to supply an external coolant or an external heat medium to the pipe portion 222. Specifically, the pipe portion 222 of the second heat exchange member 220 and the cavity portion 221 may be connected by welding, bonding, or the like, or may be integrally formed, which may be specifically set according to the actual design, and this embodiment is not specifically limited thereto. The pipe portion 222 and the cavity portion 221 of the second heat exchange member 220 are independent from each other, that is, the pipe portion 222 is not communicated with the cavity portion 221, and the pipe portion 222 is used for being connected with an external refrigerant supply component or an external heat medium supply component so as to exchange heat with the heat exchange medium inside the cavity portion 221 of the second heat exchange member 220 through the external refrigerant or the external heat medium.

More specifically, the thermal management device of the battery further includes a controller and a temperature sensor for detecting the temperature of the battery module 10. A solenoid valve, an electric control switch, etc. are respectively arranged between the external refrigerant supply part and the pipe part 222 of the external heat medium supply part and the second heat exchange part 220, and the switch is in a normally closed state, and is used for connecting or disconnecting the pipe part 222 of the second heat exchange part 220 and the external refrigerant supply part or the external heat medium supply part. When the temperature value of the battery module 10 detected by the temperature sensor exceeds a first threshold value, for example, exceeds 50 ℃, 56 ℃, 61 ℃, etc., the controller controls the switching element of the external refrigerant supply member to be opened so that the pipe portion 222 of the second heat exchange member 220 communicates with the external refrigerant supply member; when the temperature value of the battery module 10 detected by the temperature sensor is lower than a second threshold value, for example, lower than 2 deg.c, 0 deg.c, -3 deg.c, etc., the controller controls the switching member of the external heat medium supply part to be opened such that the pipe portion 222 of the second heat exchange member 220 communicates with the external heat medium supply part.

It should be noted that, the cavity portion 221 of each first heat exchange member 210 and the second heat exchange member 220 form a sealed cavity, and a heat exchange medium is disposed in the sealed cavity, so that the cavity portion 221 of each first heat exchange member 210 and the second heat exchange member 220 form a heat pipe structure. And the inner wall surface of the sealing cavity of the heat pipe structure is provided with a liquid absorption core serving as a porous capillary structure layer. The inside of the sealed cavity is pumped into a negative pressure state and is filled with a proper heat exchange medium, and the heat exchange medium has low boiling point and is easy to volatilize. When the evaporation part of the heat pipe structure is heated, the liquid in the heat pipe is quickly vaporized, the vapor flows to the condensation part under the power of heat diffusion, the heat released by condensation in the condensation part becomes liquid, and the liquid flows back to the evaporation part along the porous capillary structure layer, so that the circulation is repeated for a plurality of times, and the heat exchange process is completed. And, as shown in fig. 6 and 7, in the process that the heat exchange medium absorbs heat and evaporates to become gas, the vaporized heat exchange medium flows from bottom to top, and after the heat exchange medium releases heat and condenses to become liquid, the liquefied heat exchange medium flows from top to bottom due to the gravity of the liquid.

Therefore, as shown in fig. 6, when the pipe portion 222 of the second heat exchange member 220 is in communication with the external refrigerant supply member, each of the first heat exchange members 210 serves as an evaporation portion, the cavity portion 221 of the second heat exchange member 220 serves as a condensation portion, and the heat exchange medium inside each of the first heat exchange members 210 absorbs heat of the battery cells 110 on both sides thereof, evaporates to become gaseous, flows into the cavity portion 221 of the second heat exchange member 220, and is condensed and radiated to become liquid in the cavity portion 221 by heat transfer with the external refrigerant inside the pipe portion 222, and then flows back into each of the first heat exchange members 210 to perform heat re-circulation transfer so as to cool the battery module 10. In this process, the external refrigerant is continuously supplied to the pipe portion 222 of the second heat exchange member 220 by the external refrigerant supply means, so that the heat exchange medium in the cavity portion 221 of the second heat exchange member 220 continuously dissipates heat through the external refrigerant in the pipe portion 222, and the heat exchange medium in the cavity portion 221 of the second heat exchange member 220 serving as the condensing portion continuously absorbs the heat exchange medium in each first heat exchange member 210 serving as the evaporating portion, and compared with the sealed heat pipe structure consisting of only the evaporating portion and the condensing portion in the prior art, the heat exchange assembly 20 of the present utility model has no cooling limit, and therefore, the temperature of the heat exchange medium in the cavity portion 221 of the second heat exchange member 220 serving as the condensing portion is far lower than the temperature of the heat exchange medium in each first heat exchange member 210 serving as the evaporating portion, i.e., the temperature difference between the condensing portion and the evaporating portion of the heat exchange assembly 20 of the present utility model is not reduced, and the heat exchange speed of the heat exchange assembly 20 is not reduced, and therefore the heat exchange assembly 20 of the present utility model has a good heat exchange structure for the battery pack of the second heat exchange member 220 and the heat exchange member 220. In addition, the cavity parts 221 of the first heat exchange member 210 and the second heat exchange member 220 of the heat exchange assembly 20 form a heat pipe structure, so that the heat exchange assembly 20 applied to the heat management device of the battery has the advantages of high heat exchange efficiency and good temperature uniformity.

As shown in fig. 7, when the pipe portion 222 of the second heat exchanger 220 communicates with the external heat medium supply member, each of the first heat exchangers 210 serves as a condensing portion, the hollow portion 221 of the second heat exchanger 220 serves as an evaporating portion, the heat medium in the hollow portion 221 of the second heat exchanger 220 absorbs the heat of the external heat medium in the pipe portion 222, evaporates to become a gas, flows into each of the first heat exchangers 210, condenses and dissipates heat to become a liquid by heat transfer between the battery cells 110 on both sides thereof in each of the first heat exchangers 210, and then flows back into the hollow portion 221 to perform heat re-circulation transfer. In this process, the external heat medium supply part continuously supplies the external heat medium to the pipe part 222 of the second heat exchange member 220, so that the heat exchange medium in the cavity part 221 of the second heat exchange member 220 continuously absorbs heat through the external heat medium in the pipe part 222, and thus the heat exchange medium in the cavity part 221 of the second heat exchange member 220 serving as the evaporation part continuously supplies heat to the heat exchange medium in each first heat exchange member 210 serving as the condensation part, so that the heat exchange assembly 20 also has the heating function of the battery module 10.

Further, in the thermal management device for a battery according to the embodiment of the utility model, as shown in fig. 1 to 3, each first heat exchange member 210 is provided with a first opening 211 and a second opening 212 at both ends of the thermal management device in the height direction F thereof along at least one side of the width direction E of the thermal management device, and the position of the second opening 212 is higher than that of the first opening 211. It should be noted that, when the heat exchange assembly 20 includes one second heat exchange member 220, and one second heat exchange member 220 is disposed on one of the sides of the battery module 10 along the width direction E of the thermal management device, each of the first heat exchange members 210 is provided with a first opening 211 and a second opening 212 along the side of the thermal management device adjacent to the second heat exchange member 220 along the width direction E of the thermal management device; when the heat exchange assembly 20 includes two second heat exchange members 220, and the two second heat exchange members 220 are disposed on two sides of the battery module 10 along the width direction E of the thermal management device, the first and second openings 211 and 212 are disposed on two sides of each first heat exchange member 210 along the width direction E of the thermal management device.

As shown in fig. 1, 4 and 5, a third opening 2211 is provided in the cavity 221 of the second heat exchanger 220 at a position corresponding to the second opening 212 of each first heat exchanger 210, and the second opening 212 communicates with the third opening 2211; a fourth opening 2212 is provided in the cavity 221 at a position corresponding to the first opening 211 of each first heat exchange member 210, and the first opening 211 is communicated with the fourth opening 2212, so that each first heat exchange member 210 is communicated with the cavity 221 through the opening. In addition, the second opening 212 and the third opening 2211 and the first opening 211 and the fourth opening 2212 may be connected by adhesion, screwing, or the like, and in order to ensure tightness, the second opening 212 and the third opening 2211 and the first opening 211 and the fourth opening 2212 may be connected by interference fit, or a member having a sealing function such as a seal ring may be provided.

Specifically, as shown in fig. 6 and 7, since the gaseous heat exchange medium flows upward and the liquid heat exchange medium flows downward, the second opening 212 and the third opening 2211, which are positioned higher in the height direction F of the thermal management device, are used to exchange the gaseous heat exchange medium between the respective first heat exchange members 210 and the cavity portion 221 of the second heat exchange member 220, and the first opening 211 and the fourth opening 2212, which are positioned lower in the height direction F of the thermal management device, are used to exchange the liquid heat exchange medium between the respective first heat exchange members 210 and the cavity portion 221 of the second heat exchange member 220. Also, the shapes of the first opening 211, the second opening 212, the third opening 2211 and the fourth opening 2212 may be set to be circular, directional, rectangular, etc., which may be specifically set according to actual requirements, and the embodiment is not specifically limited thereto.

It should be noted that, in this arrangement, the heat exchange medium between each first heat exchange member 210 and the cavity 221 of the second heat exchange member 220 can only be exchanged between the first opening 211 and the fourth opening 2212, and between the second opening 212 and the third opening 2211, so that the heat exchange between the heat exchange medium inside each first heat exchange member 210 and the battery cells 110 on both sides thereof, and the heat exchange between the heat exchange medium inside the cavity 221 of the second heat exchange member 220 and the external refrigerant or the external heat medium inside the pipe 222 of the second heat exchange member 220 are more sufficient, and then the heat exchange between each first heat exchange member 210 and the cavity 221 of the second heat exchange member 220 is performed, thereby further improving the heat exchange efficiency of the thermal management device of the battery.

Further, in the thermal management device for a battery according to the embodiment of the utility model, as shown in fig. 1, 4 and 5, the second heat exchange member 220 is configured in a plate-like structure, the side surface of the cavity portion 221 of the second heat exchange member 220, which is far from each first heat exchange member 210, is provided with a pipe cavity 2221 in a bonding manner, and the heat exchange pipe 2222 is disposed in the pipe cavity 2221 to form a pipe portion 222.

Specifically, the pipe cavity 2221 may be attached to the cavity 221 of the second heat exchange element 220 by welding, bonding, clamping, or the like. The heat exchange tube 2222 may be set inside the pipe cavity 2221 in straight line, snake shape, annular shape, etc. and the heat exchange tube 2222 may be connected to the pipe cavity 2221 via welding, adhering, etc. or may be formed integrally. In addition, the cross section of the heat exchange tube 2222 may be configured as a rectangle, a square, a circle, etc., which may be specifically set according to actual design, and this embodiment is not particularly limited thereto.

It should be noted that, the heat exchange tube 2222 is disposed in the pipe cavity 2221 and can reduce heat exchange between the external refrigerant or the external heat medium in the heat exchange tube 2222 and the external air, so as to reduce heat loss of the pipe portion 222 of the second heat exchange member 220, so that as much heat of the external refrigerant or the external heat medium in the heat exchange tube 2222 of the pipe portion 222 as possible exchanges heat with the heat exchange medium in the cavity portion 221 of the second heat exchange member 220, thereby further improving the heat exchange efficiency of the thermal management device of the battery.

Further, in the thermal management device for a battery according to the embodiment of the present utility model, as shown in fig. 1, 4 and 5, a pipe joint 223 is disposed on at least one side of the second heat exchange member 220 along the length direction D of the thermal management device, one end of the pipe joint 223 is communicated with the heat exchange pipe 2222 in the pipe portion 222, the other end is provided with an inlet port and/or an outlet port for connecting with one end of an external connection pipe, and the other end of the external connection pipe can be connected with an external refrigerant supply component or an external heat medium supply component.

Specifically, the second heat exchange member 220 may have a pipe joint 223 disposed at one side along the length direction D of the thermal management device, and the pipe joint 223 is provided with an inlet port and an outlet port at intervals, at this time, the heat exchange tube 2222 in the pipe portion 222 is a reciprocating pipe, and an inlet of the reciprocating pipe is communicated with the inlet port on the pipe joint 223, and an outlet of the reciprocating pipe is communicated with the outlet port on the pipe joint 223; the second heat exchange member 220 may also have pipe joints 223 disposed on both sides along the length direction D of the heat management device, wherein one pipe joint 223 of the pipe joints 223 is provided with an inlet port, the other pipe joint 223 is provided with an outlet port, at this time, the heat exchange tube 2222 in the pipe portion 222 is a unidirectional pipe, the inlet of the unidirectional pipe is communicated with the inlet port of the one pipe joint 223, and the outlet of the unidirectional pipe is communicated with the outlet port of the other pipe joint 223. The inlet port and the outlet port of the pipe joint 223 are also connected to external pipes, respectively, so that a circuit is formed between the heat exchange pipe 2222 in the pipe portion 222 and an external refrigerant supply member or an external heat medium supply member through the external pipes. In addition, the pipe joint 223 may be fixedly connected to the second heat exchange member 220 by a fastening, a screwing, or the like.

It should be noted that, the pipe joint 223 is convenient for connecting the external pipe connected with the external refrigerant supply part or the external heat medium supply part with the heat exchange pipe 2222 in the pipe portion 222 of the second heat exchange member 220, thereby improving the convenience of installing the thermal management device of the battery.

Further, in the thermal management device for a battery according to the embodiment of the present utility model, as shown in fig. 1 and 5, a plurality of ribs 2213 are disposed in the cavity 221 on the side surface close to each first heat exchange member 210 and the side surface far from each first heat exchange member 210 in a staggered manner. The number of the ribs 2213 may be two, five, ten, or the like, and the ribs 2213 may be connected to the cavity 221 by welding, bonding, or the like, or may be integrally formed with the cavity 221. The specific configuration may be set according to the actual situation, and the present embodiment is not limited thereto.

It should be noted that, the arrangement of the reinforcing ribs 2213 in the cavity 221 can improve the structural strength of the cavity 221, and can also play a certain role in blocking the heat exchange medium in the cavity 221, so as to reduce the flow speed of the heat exchange medium in the cavity 221, so that the heat exchange between the heat exchange medium in the cavity 221 of the second heat exchange member 220 and the external refrigerant or the external heat medium in the pipe portion 222 of the second heat exchange member 220 is more sufficient, thereby further improving the heat exchange efficiency of the thermal management device of the battery.

Further, in the thermal management device for a battery according to the embodiment of the utility model, as shown in fig. 1 to 3, the first heat exchange member 210 is provided in a plate-shaped structure, and the fins 213 are respectively provided in the first heat exchange member 210 in a staggered arrangement on both sides in the longitudinal direction D of the thermal management device. Specifically, the number of the fins 213 may be two, five, ten, etc., and the fins 213 may be connected to the first heat exchange member 210 by welding, bonding, etc., or may be integrally formed with the first heat exchange member 210. The specific configuration may be set according to the actual situation, and the present embodiment is not limited thereto.

It should be noted that, the first heat exchange members 210 are configured in a plate structure, so as to improve the degree of adhesion between each first heat exchange member 210 and the battery cells 110 on both sides thereof, thereby improving the heat exchange area between the heat exchange medium inside each first heat exchange member 210 and the battery cells 110 on both sides thereof, and improving the heat exchange efficiency thereof. The arrangement of the fins 213 in the first heat exchange member 210 can improve the structural strength of the first heat exchange member 210, and can also play a certain role in blocking the heat exchange medium in the first heat exchange member 210 so as to reduce the flow speed of the heat exchange medium in the first heat exchange member 210, so that the heat exchange between the heat exchange medium in each first heat exchange member 210 and the battery monomers 110 on two sides of the heat exchange medium is more sufficient, and the heat exchange efficiency of the thermal management device of the battery is further improved.

Further, in the thermal management device for a battery according to the embodiment of the utility model, as shown in fig. 1, 4 and 5, the barrier 2214 is disposed in the cavity 221 of each second heat exchange member 220 at a position between each two adjacent first heat exchange members 210, so that a plurality of sealed sub-cavities are formed in the cavity 221 of each second heat exchange member 220, and each sub-cavity is communicated with the corresponding first heat exchange member 210. Heat exchange media are arranged in the sealed cavities formed between the sub-cavities and the corresponding first heat exchange pieces 210, and the heat exchange media can circularly flow between the sub-cavities and the corresponding first heat exchange pieces 210.

Specifically, the barrier 2214 may be connected to the cavity 221 by welding, bonding, or the like, or may be integrally formed with the cavity 221. The specific configuration may be set according to the actual situation, and the present embodiment is not limited thereto.

It should be noted that, in this arrangement manner, each sub-cavity and the corresponding first heat exchange member 210 respectively form a sub-cavity structure, and each sub-cavity structure is internally provided with a heat exchange medium respectively, so that the cavity portion 221 of the second heat exchange member 220 and the heat exchange medium in each first heat exchange member 210 are distributed more uniformly, thereby improving the temperature uniformity of the heat exchange assembly 20 of the thermal management device of the battery.

Further, in the thermal management device for a battery according to the embodiment of the present utility model, as shown in fig. 1 and 4, the cavity 221 of the second heat exchanging member 220 is integrally formed with the first heat exchanging member 210. It should be noted that, this arrangement ensures the tightness between the cavity 221 of the second heat exchange member 220 and the first heat exchange member 210, and avoids the connection between the cavity 221 of the second heat exchange member 220 and the first heat exchange member 210, so that the structures of the cavity 221 of the second heat exchange member 220 and the first heat exchange member 210 are simpler.

The use process of the thermal management device of the battery is as follows: as shown in fig. 1 to 6, when the temperature value of the battery module 10 detected by the temperature sensor exceeds a first threshold, for example, exceeds 50 deg.c, 56 deg.c, 61 deg.c, etc., the battery module 10 needs to be cooled, the controller controls the switching element of the external refrigerant supply member to be opened such that the pipe portion 222 of the second heat exchange member 220 communicates with the external refrigerant supply member. At this time, each of the first heat exchange members 210 serves as an evaporation portion, the cavity portion 221 of the second heat exchange member 220 serves as a condensation portion, the heat exchange medium inside each of the first heat exchange members 210 absorbs heat of the battery cells 110 at both sides thereof, evaporates to become a gaseous state, flows upward, flows into the cavity portion 221 of the second heat exchange member 220 through the second opening 212 and the third opening 2211, condenses and dissipates heat to become a liquid through heat transfer with the external refrigerant inside the pipe portion 222 inside the cavity portion 221, flows downward under the gravity of the liquid, and then flows back into the inside of each of the first heat exchange members 210 through the first opening 211 and the fourth opening 2212 again to perform a re-circulation transfer of heat, so as to cool the battery module 10. In this process, the external refrigerant supply means continuously supplies the external refrigerant to the pipe portion 222 of the second heat exchanger 220, so that the heat exchange medium in the cavity portion 221 of the second heat exchanger 220 continuously dissipates heat through the external refrigerant in the pipe portion 222, and the heat exchange medium in the cavity portion 221 of the second heat exchanger 220 serving as a condensing portion continuously absorbs heat of the heat exchange medium in each of the first heat exchangers 210 serving as an evaporating portion. Therefore, the temperature difference between the condensing part and the evaporating part of the heat exchange assembly 20 of the thermal management device of the battery is not reduced, so the heat exchange speed of the heat exchange assembly 20 is not reduced, and the heat exchange assembly 20 has no cooling limit.

As shown in fig. 1 to 5 and 7, when the temperature value of the battery module 10 detected by the temperature sensor exceeds a first threshold value, for example, exceeds 50 c, 56 c, 61 c, etc., the controller controls the switching element of the external refrigerant supply member to be opened such that the pipe portion 222 of the second heat exchange member 220 communicates with the external refrigerant supply member. At this time, each of the first heat exchange members 210 serves as a condensing part, the cavity part 221 of the second heat exchange member 220 serves as an evaporating part, the heat exchange medium inside the cavity part 221 of the second heat exchange member 220 absorbs heat of the external heat medium in the pipe part 222 to evaporate to become gas to flow upward, and flows into each of the first heat exchange members 210 through the second and third openings 212 and 2211, then condenses and dissipates heat to become liquid inside each of the first heat exchange members 210 through heat transfer between the battery cells 110 on both sides thereof, and flows downward under the gravity of the liquid, and then flows back into the cavity part 221 through the first and fourth openings 211 and 2212 again to perform heat re-circulation transfer. In this process, the external heat medium supply part continuously supplies the external heat medium to the pipe part 222 of the second heat exchange member 220, so that the heat exchange medium in the cavity part 221 of the second heat exchange member 220 continuously absorbs heat through the external heat medium in the pipe part 222, and thus the heat exchange medium in the cavity part 221 of the second heat exchange member 220 serving as the evaporation part continuously supplies heat to the heat exchange medium in each first heat exchange member 210 serving as the condensation part, so that the heat exchange assembly 20 also has the heating function of the battery module 10.

Example 2

The present embodiment discloses a thermal management device for a battery, as shown in fig. 8 and 9, which is different from the thermal management device for a battery in embodiment 1 only in that the thermal management device for a battery in the present embodiment includes a second heat exchange member 220, and the second heat exchange member 220 is disposed on top of the battery module 10 along the height direction F of the thermal management device. And, this arrangement is simpler than the overall structure of the thermal management device of the battery in embodiment 1.

It should be noted that, because the wick as the porous capillary structure layer is disposed on the inner wall surface of the sealed cavity of the heat pipe structure formed by the first heat exchange member 210 and the cavity 221 of the second heat exchange member 220, the wick disposed on the inner wall surface of the cavity 221 of the second heat exchange member 220 absorbs the heat of the external heat medium in the cavity 221 of the second heat exchange member 220, so that the liquid heat exchange medium is also present in the cavity 221 of the second heat exchange member 220 disposed on the top of the battery module 10 along the height direction F of the heat management device, so that when the battery module 10 needs to be heated, the liquid heat exchange medium in the cavity 222 of the second heat exchange member 220 absorbs the heat of the external heat medium in the cavity 221 of the second heat exchange member 220 and evaporates into gas to be accumulated in the cavity 221 of the second heat exchange member 220, and as the concentration of the gaseous heat exchange medium in the cavity 221 of the second heat exchange member 220 is continuously increased, the gaseous heat exchange medium is extruded and flows into the first heat exchange member 210, and then passes through the heat exchange medium in the two sides of the battery module 210 and is absorbed by the heat exchange medium, and is absorbed by the liquid in the heat exchange member, and is absorbed by the inner wall surface of the second heat exchange member, and the liquid is absorbed by the heat exchange medium is absorbed by the inner wall of the heat exchange member, and the heat exchange member is absorbed by the liquid in the heat pipe, and the heat exchange member is absorbed by the heat exchange medium, and the liquid is absorbed by the liquid. Moreover, the operation of the thermal management device of the battery in this embodiment is identical to that of the thermal management device of the battery in embodiment 1, and is not described here again,

Further, the side surface of each first heat exchange member 210 connected to the cavity portion 221 of the second heat exchange member 220 may be provided with a first opening 211 and a second opening 212, the cavity portion 221 of the second heat exchange member 220 is provided with a third opening 2211 at a position corresponding to the second opening 212 of each first heat exchange member 210, and the second opening 212 is communicated with the third opening 2211; a fourth opening 2212 is provided in the cavity 221 at a position corresponding to the first opening 211 of each first heat exchange member 210, and the first opening 211 is communicated with the fourth opening 2212, so that each first heat exchange member 210 is communicated with the cavity 221 through the opening. As shown in fig. 9, the side surface of each first heat exchange member 210 connected to the cavity 221 of the second heat exchange member 220 may be entirely open so that each first heat exchange member 210 communicates with the cavity 221. Preferably, since the second heat exchange member 220 of the thermal management device of the battery in the present embodiment is disposed at the top of the battery module 10 in the height direction F of the thermal management device, in order to increase the flow rate of the heat exchange medium between each first heat exchange member 210 and the cavity portion 221 of the second heat exchange member 220, the side surface of each first heat exchange member 210 connected to the cavity portion 221 of the second heat exchange member 220 is integrally opened, and the cavity portion 221 of the second heat exchange member 220 is also integrally connected, i.e. no barrier 2214 is disposed at a position between each adjacent two of the first heat exchange members 210 in the cavity portion 221 of the second heat exchange member 220. In addition, each first heat exchange member 210 in the present embodiment may be disposed in a honeycomb-like structure, so that heat exchange between each first heat exchange member 210 and the battery cells 110 on both sides thereof is more sufficient.

Example 3

The present embodiment discloses a battery pack including the thermal management device of the battery in embodiment 1 or embodiment 2. Specifically, the battery pack can be applied to mobile phones, flat plates, notebook computers, electric toys, electric tools, battery cars, electric automobiles, hybrid automobiles, ships, spacecrafts and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, spacecraft, and the like. Taking an electric automobile as an example, in a thermal management device applied to a battery pack of the electric automobile, the external refrigerant supply component and the external heating medium supply component may be devices of the electric automobile, for example, devices for supplying a refrigerant for air conditioning and a heating medium for air conditioning and heating of the electric automobile. The controller for controlling the communication of the pipe portion 222 of the second heat exchanging member 220 with the external refrigerant supply part or the external heat medium supply part may be integrated in a driving computer of the electric vehicle, so that the overall structure of the thermal management device of the battery pack is simpler.

It should be noted that, when the pipe portion 222 of the second heat exchange member 220 of the battery thermal management device of the battery pack is connected with the external refrigerant supply member, the external refrigerant supply member continuously supplies the external refrigerant to the pipe portion 222 of the second heat exchange member 220, so that the heat exchange medium in the cavity portion 221 of the second heat exchange member 220 can continuously dissipate heat through the external refrigerant in the pipe portion 222, and further, the heat exchange medium in the cavity portion 221 of the second heat exchange member 220 serving as the condensation portion can continuously absorb heat absorbed by the heat exchange medium in each first heat exchange member 210 serving as the evaporation portion from the battery cells 110 on both sides thereof, so that the temperature difference between the condensation portion and the evaporation portion of the heat exchange assembly 20 is not reduced, the heat exchange speed of the heat exchange assembly 20 is not reduced, and the cooling limit of the heat exchange assembly 20 is not existed, therefore, the heat pipe structure composed of each first heat exchange member 210 of the second heat exchange member 220 and the cavity portion 221 of the second heat exchange member 220 can be well applied to the battery thermal management device, so as to well cool the battery pack. In addition, the cavity parts 221 of the first heat exchange member 210 and the second heat exchange member 220 of the heat exchange assembly 20 form a heat pipe structure, so that the heat exchange assembly 20 applied to the heat management system of the battery has the advantages of high heat exchange efficiency and good temperature uniformity. In addition, when the battery pack needs to be heated, the external heat medium supply means continuously supplies the external heat medium to the pipe portion 222 of the second heat exchange member 220, so that the heat exchange medium in the cavity portion 221 of the second heat exchange member 220 can continuously absorb heat through the external heat medium in the pipe portion 222, and further, the heat exchange medium in the cavity portion 221 of the second heat exchange member 220 serving as the evaporation portion can continuously supply heat to the heat exchange medium in each first heat exchange member 210 serving as the condensation portion, and further, heat is supplied to the battery cells 110 on both sides thereof through the heat exchange medium in each first heat exchange member 210, so as to heat the battery pack.

Example 4

This embodiment discloses an automobile including the battery pack of embodiment 3. Specifically, the vehicle may be a hybrid vehicle or a pure electric vehicle, and the hybrid vehicle may be a plug-in hybrid vehicle or a non-plug-in hybrid vehicle.

It should be noted that when the battery pack of the automobile needs to be cooled, the cooling process of the battery pack can be completed through the thermal management device of the battery, and when the battery pack of the automobile needs to be heated, the heating process of the battery pack can be completed through the thermal management device of the battery, so as to meet the cold and hot requirements of the battery pack of the automobile under different working conditions. In addition, since the thermal management device of the battery pack of the automobile includes the heat pipe structure composed of the cavity parts 221 of the first heat exchange member 210 and the second heat exchange member 220, the thermal management device of the battery pack of the automobile has the advantages of high heat exchange efficiency and good temperature uniformity.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (10)

1. The heat management device of the battery is characterized by comprising a battery module and a heat exchange assembly for performing a heat exchange function on the battery module;

the battery module comprises a plurality of battery cells which are arranged at intervals along the length direction of the thermal management device;

the heat exchange assembly comprises at least one first heat exchange piece with a cavity structure inside, and each first heat exchange piece in the at least one first heat exchange piece is arranged between two adjacent battery monomers in the plurality of battery monomers and is attached to the side surfaces of the battery monomers on two sides of the heat exchange piece;

the heat exchange assembly further comprises: a second heat exchange member disposed on at least one side of the battery module in a width direction of the thermal management device, or a second heat exchange member disposed on the top of the battery module in a height direction of the thermal management device; wherein the second heat exchange member comprises a cavity part and a pipeline part; the inside of the cavity part is of a cavity structure, and the cavity part is communicated with each first heat exchange piece; the heat exchange medium is arranged in a sealed cavity formed by the cavity part and each first heat exchange piece and can circularly flow between the cavity part and each first heat exchange piece;

The pipeline part is attached to the side surface, far away from each first heat exchange piece, of the cavity part and is independently arranged with the cavity part; the pipe portion may communicate with an external coolant supply member or an external heat medium supply member to supply an external coolant or an external heat medium to the pipe portion.

2. The thermal management device of a battery according to claim 1, wherein when the second heat exchange member is provided on at least one side of the battery module in the width direction of the thermal management device, each of the first heat exchange members is provided with a first opening and a second opening at both ends of the thermal management device in the height direction thereof in at least one side of the width direction of the thermal management device, respectively, and the second opening is located higher than the first opening;

when the second heat exchange pieces are arranged on the top of the battery module in the height direction of the thermal management device, a first opening and a second opening are respectively formed in the top of each first heat exchange piece in the height direction of the thermal management device;

a third opening is formed in the cavity part of the second heat exchange piece at a position corresponding to the second opening of each first heat exchange piece, and the second opening is communicated with the third opening; and a fourth opening is arranged on the cavity part at a position corresponding to the first opening of each first heat exchange piece, and the first opening is communicated with the fourth opening.

3. The heat management apparatus according to claim 1 or 2, wherein the second heat exchange members are provided in a plate-like structure, and a pipe cavity is provided on the cavity portion of the second heat exchange members in a manner of being attached to a side surface of the cavity portion remote from each of the first heat exchange members, and a heat exchange pipe is provided in the pipe cavity to form the pipe portion.

4. A thermal management device for a battery according to claim 3, wherein a pipe joint is provided on at least one side of the second heat exchange member in the longitudinal direction of the thermal management device, one end of the pipe joint communicates with the heat exchange pipe in the pipe portion, the other end is provided with an inlet port and/or an outlet port for connecting one end of an external connection pipe, and the other end of the external connection pipe is connectable to the external refrigerant supply member or the external heat medium supply member.

5. The battery thermal management device according to claim 4, wherein a plurality of ribs are provided in the cavity portion on a side surface close to each of the first heat exchange members and a side surface away from each of the first heat exchange members in a staggered arrangement.

6. The thermal management device of a battery according to claim 1 or 2, wherein the first heat exchange member is provided in a plate-like structure, and fins are provided in the first heat exchange member in a staggered arrangement on both sides in a longitudinal direction of the thermal management device, respectively.

7. The thermal management device of a battery according to claim 1 or 2, wherein a barrier plate is provided in each of the cavity portions of each of the second heat exchange members at a position between each of adjacent two of the first heat exchange members, such that a plurality of sub-cavities sealed with each other are formed in the cavity portion of each of the second heat exchange members, and each of the sub-cavities communicates with the corresponding one of the first heat exchange members;

the heat exchange medium is arranged in a sealed cavity formed between each subcavity and the corresponding first heat exchange piece, and the heat exchange medium can circularly flow between each subcavity and the corresponding first heat exchange piece.

8. The thermal management device of a battery according to claim 1 or 2, wherein the cavity portion of the second heat exchange member is integrally formed with the first heat exchange member.

9. A battery pack comprising the thermal management device of a battery according to any one of claims 1-8.

10. An automobile comprising the battery pack according to claim 9.

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