A dry water cooling-based lithium battery thermal management device

Abstract

The application is a dry water cooling lithium battery heat management device, which comprises a shell with an opening at the top, an inner cavity is formed in the shell, a cover plate, a plurality of heat dissipation parts arranged in parallel and having heat dissipation chambers are arranged in the inner cavity, the heat dissipation chambers are used for placing lithium batteries, and two liquid storage bags are arranged on both sides of the inner cavity and on both sides of the plurality of heat dissipation parts, each liquid storage bag is in contact with the side surface of the corresponding heat dissipation part, the two liquid storage bags and the heat dissipation parts are connected in series through a hose, the inner cavities of the two liquid storage bags and the interlayers of the heat dissipation parts are filled with dry water, the plurality of heat dissipation parts and the two liquid storage bags are connected in series through the hose, the dry water is stored in the liquid storage bags and the heat dissipation parts, the lithium batteries are placed in the heat dissipation parts, and heat exchange is performed between the dry water and the lithium batteries; the liquid storage bags are in contact with the heat dissipation parts, the liquid storage bags play a buffering role, and damage of the lithium batteries is avoided; the flow of the cooling medium is realized by acceleration or deceleration of the automobile, and the lithium batteries are cooled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium batteries, in particular to a dry water cooling lithium battery thermal management device. BACKGROUND

[0002] With the development of various new energy in the field of automobiles, traditional gasoline vehicles are impacted, and electric vehicles are increasingly popular among the public. As one of the important battery packs of electric vehicles, lithium batteries are favored due to their high energy density and low self-discharge rate.

[0003] In the existing lithium battery cooling process, a water cooling plate is often used to cool the battery. However, additional power is required to drive the cooling medium to circulate and complete heat exchange of the cooling medium during the cooling process.

[0004] Therefore, how to realize the circulation cooling of the cooling medium following the movement of the automobile has become a problem that researchers in the field need to solve. SUMMARY

[0005] The technical problem to be solved by the present application is how to realize the circulation cooling of the cooling medium following the movement of the automobile.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0007] The present application is a dry water cooling lithium battery thermal management device, which comprises: a shell with an opening at the top, an inner cavity is formed in the shell; a cover plate adapted to cover the opening at the top of the shell; a plurality of heat dissipation parts arranged in parallel and having heat dissipation chambers, which are arranged in the inner cavity, and the heat dissipation chambers are used for placing lithium batteries; and two liquid storage bags arranged on both sides of the inner cavity and located on both sides of the plurality of heat dissipation parts, each liquid storage bag is in contact with the side surface of the corresponding heat dissipation part, wherein the two liquid storage bags and the heat dissipation parts are connected in series by a hose; and the inner space of the two liquid storage bags and the interlayer of the heat dissipation part are filled with dry water.

[0008] In this scheme, the plurality of heat dissipation parts and the two liquid storage bags are connected in series by a hose, the liquid storage bags and the heat dissipation parts store dry water, the lithium batteries are placed in the heat dissipation parts, and heat exchange is performed between the dry water and the lithium batteries; the liquid storage bags are in contact with the heat dissipation parts, and the liquid storage bags play a buffering role to prevent the lithium batteries from being damaged.

[0009] For example, during the acceleration process of the automobile, the lithium batteries remain relatively stationary in the thermal management device, the liquid storage bag on the rear side of the movement direction is pressed against the heat dissipation part, and the liquid storage bag on the front side of the movement direction is slightly away from the heat dissipation part, so that the dry water flows from the rear to the front to participate in cooling.

[0010] In summary, the present application utilizes the acceleration or deceleration of the automobile to realize the flow of the cooling medium and to cool the lithium battery.

[0011] In order to further improve the cooling effect, the present application adopts the honeycomb structure in the interlayer of the heat dissipation part.

[0012] In this way, when the dry water flows in the heat dissipation part, the dry water surface is honeycomb textured, which can not only improve the convective heat transfer coefficient of the dry water, but also increase the flow path of the dry water, thereby improving the heat dissipation effect.

[0013] In order to prevent the heat dissipation part from colliding with the heat dissipation part, the present application adopts a plurality of positioning columns arranged in the inner cavity of the shell, and the adjacent two heat dissipation parts are in contact through the positioning columns.

[0014] The adjacent two heat dissipation parts are spaced apart through the positioning part, which avoids the collision between the heat dissipation parts.

[0015] In order to further improve the cooling efficiency, the present application adopts a graphene plate arranged between the positioning column and the heat dissipation part.

[0016] The graphene plate arranged between the positioning column and the heat dissipation part is used to solve the problem that the heat dissipation performance is reduced due to the temperature rise of the dry water in the heat dissipation plate caused by heat absorption.

[0017] In order to illustrate the specific structure of the heat dissipation part, the present application adopts the heat dissipation part comprising: a heat dissipation substrate composed of a side wall and a bottom wall, and a heat dissipation plate, wherein the inner side of the heat dissipation substrate is provided with a positioning groove, and the heat dissipation plate is provided with a positioning protrusion matched with the positioning groove.

[0018] In the present application, the position of the heat dissipation plate inserted into the heat dissipation substrate is determined according to the length of the lithium battery, the heat dissipation plate is inserted into the heat dissipation substrate, and the lithium battery is placed in the space surrounded by the heat dissipation plate and the heat dissipation substrate.

[0019] In order to improve the cooling of the lithium battery, the present application adopts the honeycomb structure in the interlayer of the heat dissipation substrate and the heat dissipation plate, and the heat dissipation substrate and the heat dissipation plate are connected through a quick connector.

[0020] In the present application, the heat dissipation substrate and the heat dissipation plate can be filled with dry water, which can realize five-face cooling of the lithium battery and improve the cooling efficiency of the lithium battery.

[0021] In order to adjust the size of the extrusion force of the heat dissipation part and the liquid storage bag, the present application adopts the shell having a containing cavity on both sides for placing the liquid storage bag; an extrusion plate is arranged between the liquid storage bag and the side wall of the containing cavity; an adjusting member is threadedly connected with the shell, and the end portion thereof is movably connected with the extrusion plate through the shell.

[0022] In the complex road conditions with more sudden acceleration, the adjusting member is rotated, the extrusion plate is away from the liquid storage bag, so that the dry water can be fully heat exchanged; in the highway condition with less sudden acceleration, the adjusting member is rotated, the extrusion plate is close to the liquid storage bag, and the dry water can be fully heat exchanged.

[0023] When the vehicle is uniformly driven, the liquid storage bag is not extruded, in order to realize the heat dissipation of the device, the bottom of the shell is provided with an air inlet; the bottom of the heat dissipation part is provided with a heat dissipation fan, the heat dissipation fan is located at the air inlet; the cover plate is provided with an air outlet; the pressing plate is suitable for covering the air outlet; the rotating seat is arranged on the cover plate; the connecting plate is hinged to the rotating seat in the middle, one end of the connecting plate is connected with the pressing plate, and the other end of the connecting plate is provided with a first elastic element between the pressing plate and the cover plate.

[0024] In the scheme, during the uniform driving of the vehicle, the heat dissipation fan flows the gas from the air inlet to the air outlet, realizes the air cooling of the heat dissipation part, the airflow can overcome the force of the first elastic element and separate the pressing plate from the air outlet, and realizes the one-way circulation of the air cooling.

[0025] In order to prevent the heat dissipation part from colliding with the shell during the driving of the vehicle, the heat dissipation part close to the side wall of the shell is connected with the inner side wall of the shell through the second elastic element.

[0026] In the scheme, the second elastic element plays a buffering role, avoids the deformation of the heat dissipation part due to the impact of the heat dissipation part on the shell.

[0027] The beneficial effects of the present application are as follows: the present application is a dry water cooling lithium battery thermal management device, a plurality of heat dissipation parts and two liquid storage bags are connected in series through a hose, the liquid storage bag and the heat dissipation part store dry water, the lithium battery is arranged in the heat dissipation part, and heat exchange is carried out between the dry water and the lithium battery; the liquid storage bag contacts the heat dissipation part, the liquid storage bag plays a buffering role, avoids damage to the lithium battery, and more importantly, the cooling medium is passively flowed in the heat dissipation part while buffering, and a good cooling effect is achieved; the scheme utilizes the acceleration or deceleration of the automobile to realize the flow of the cooling medium, and realizes the cooling of the lithium battery. BRIEF DESCRIPTION OF DRAWINGS

[0028] The present application will be further described below in combination with the drawings and examples.

[0029] Figure 1 It is a bottom structure schematic view of the present application;

[0030] Figure 2 It is a structure schematic view of the present application omitting the shell and the cover plate;

[0031] Figure 3 It is an auxiliary view sectional view of the present application;

[0032] Figure 4 is a sectional view of the heat dissipation part;

[0033] Figure 5 is a schematic view of the top structure of the cover plate;

[0034] Figure 6 is a schematic view of the bottom structure of the cover plate;

[0035] In the figure: 1 - shell, 11 - accommodating cavity, 12 - air inlet, 13 - heat dissipation fan, 2 - cover plate, 21 - air outlet, 22 - pressing plate, 23 - rotating seat, 24 - connecting plate, 25 - first elastic member, 26 - second elastic member, 3 - heat dissipation part, 31 - honeycomb structure, 32 - heat dissipation base plate, 33 - heat dissipation plate, 4 - liquid storage bag, 5 - hose, 6 - positioning column, 7 - extrusion plate, 8 - adjusting member. DETAILED DESCRIPTION

[0036] The application will now be described in further detail with reference to the drawings. These drawings are simplified schematic views which only show the basic structure of the application in a schematic manner, and thus only show the components which are relevant to the application.

[0037] As shown in Figures 1-6 the application is a dry water-based lithium battery thermal management device, comprising: a shell 1 with an opening at the top, an inner cavity is formed in the shell 1; a cover plate 2 adapted to cover the opening at the top of the shell 1; a plurality of heat dissipation parts 3 arranged in parallel and having heat dissipation chambers for placing lithium batteries, arranged in the inner cavity; and two liquid storage bags 4 arranged on both sides of the inner cavity and located on both sides of the plurality of heat dissipation parts 3, each of the liquid storage bags 4 is in contact with the side of the corresponding heat dissipation part 3, wherein the two liquid storage bags 4 and the heat dissipation parts 3 are connected in series by a hose 5; the inner space of the two liquid storage bags 4 and the interlayer of the heat dissipation parts 3 are filled with dry water;

[0038] In this scheme, the plurality of heat dissipation parts and the two liquid storage bags are connected in series by a hose, the dry water is stored in the liquid storage bags and the heat dissipation parts, the lithium battery is placed in the heat dissipation part, and the dry water exchanges heat with the lithium battery; the liquid storage bags are in contact with the heat dissipation parts, and the liquid storage bags play a buffering role to avoid damage to the lithium battery;

[0039] For example, during the acceleration process of the automobile, the lithium battery remains relatively stationary in the thermal management device, the liquid storage bag on the rear side of the movement direction is extruded with the heat dissipation part, and the liquid storage bag on the front side of the movement direction is slightly away from the heat dissipation part, so that the dry water flows from the rear to the front to participate in cooling;

[0040] In summary, the flow of the cooling medium is realized by the acceleration or deceleration of the automobile, and the cooling of the lithium battery is realized.

[0041] As shown in Figure 4As shown in the figure, in order to further improve the cooling effect, the present application adopts the honeycomb structure 31 in the sandwich of the heat dissipation part 3;

[0042] In this way, when the dry water flows in the heat dissipation part, the dry water surface is honeycomb texture, which can not only improve the convective heat transfer coefficient of the dry water, but also increase the flow path of the dry water, thereby improving the heat dissipation effect.

[0043] As shown in the figure, Figure 3 As shown in the figure, in order to prevent the heat dissipation part from colliding with the heat dissipation part, the present application adopts a plurality of positioning columns 6 arranged in the inner cavity of the shell 1, and the adjacent two heat dissipation parts 3 are in contact through the positioning columns 6;

[0044] The adjacent two heat dissipation parts are spaced apart through the positioning part, so that the heat dissipation part is prevented from colliding with the heat dissipation part.

[0045] In order to further improve the cooling efficiency, the present application adopts a graphene plate arranged between the positioning column 6 and the heat dissipation part 3;

[0046] The graphene plate arranged between the positioning column and the heat dissipation part is used to solve the problem that the heat dissipation performance is reduced due to the temperature rise of the dry water in the heat dissipation plate caused by heat absorption.

[0047] As shown in the figure, Figure 3 As shown in the figure, in order to illustrate the specific structure of the heat dissipation part, the present application adopts the heat dissipation part 3, which comprises a heat dissipation substrate 32 composed of a side wall and a bottom wall, and a heat dissipation plate 33, wherein the inner side of the heat dissipation substrate 32 is provided with a positioning groove, and the heat dissipation plate 33 is provided with a positioning protrusion matched with the positioning groove;

[0048] In this scheme, the position of the heat dissipation plate inserted into the heat dissipation substrate is determined according to the length of the lithium battery, the heat dissipation plate is inserted into the heat dissipation substrate, and the lithium battery is placed in the space surrounded by the heat dissipation plate and the heat dissipation substrate.

[0049] In order to improve the cooling of the lithium battery, the present application adopts the honeycomb structure in the sandwich of the heat dissipation substrate 32 and the heat dissipation plate 33, and the heat dissipation substrate 32 and the heat dissipation plate 33 are communicated through the quick connector;

[0050] In this scheme, the heat dissipation substrate and the heat dissipation plate can be filled with dry water, and the cooperation of the quick connector realizes the circulation of the dry water, so that the five surface cooling of the lithium battery can be realized, and the cooling efficiency of the lithium battery is improved.

[0051] As shown in the figure, Figure 3 As shown in the figure, how to adjust the size of the extrusion force of the heat dissipation part and the liquid storage bag, the present application adopts that the both sides of the shell 1 have a containing cavity 11 corresponding to the liquid storage bag 4; the extrusion plate 7 is arranged between the liquid storage bag 4 and the side wall of the containing cavity 11; the adjusting part 8 is threadedly connected with the shell 1, and the end part thereof is movably connected with the extrusion plate 7 through the shell 1;

[0052] In the complex road conditions with more sudden acceleration, the adjusting member is rotated to move the extrusion plate away from the liquid storage bag, so that the dry water can be fully heat exchanged; in the highway conditions with less sudden acceleration, the adjusting member is rotated to move the extrusion plate close to the liquid storage bag, so that the dry water can be fully heat exchanged.

[0053] As shown in Figure 1 , 3 , 5, 6, when the vehicle is running at a constant speed, the liquid storage bag will not be extruded, in order to realize the heat dissipation of the device, the bottom of the shell 1 is provided with an air inlet 12; the bottom of the heat dissipation part 3 is provided with a heat dissipation fan 13, the heat dissipation fan 13 is located at the air inlet 12; the cover plate 2 is provided with an air outlet 21; the pressing plate 22 is suitable for covering the air outlet 21; the rotating seat 23 is arranged on the cover plate 2; the connecting plate 24 is hinged to the rotating seat 23 in the middle, one end of the connecting plate 24 is connected with the pressing plate 22, and the other end of the connecting plate 24 is provided with a first elastic element 25 between the cover plate 2;

[0054] In this scheme, during the process of the vehicle running at a constant speed, the heat dissipation fan is used to flow the gas from the air inlet to the air outlet, so as to realize the air cooling of the heat dissipation part, the airflow can separate the pressing plate from the air outlet by overcoming the force of the first elastic element, and realize the one-way circulation of air cooling.

[0055] As shown in Figure 3 , in order to prevent the heat dissipation part from colliding with the shell during the driving of the vehicle, the heat dissipation part 3 close to the side wall of the shell 1 is connected with the inner side wall of the shell 1 through the second elastic element 26;

[0056] In this scheme, the second elastic element plays a buffering role, avoiding the deformation of the heat dissipation part due to the impact on the shell.

[0057] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope of the present application must be determined according to the scope of claims.

Claims

1. A thermal management device for lithium batteries based on dry water cooling, characterized in that: include: A shell having an opening at the top and an inner cavity therein; a cover plate, adapted to cover the top opening of the housing; A plurality of heat dissipation parts are arranged in parallel and have heat dissipation cavities, which are arranged in the inner cavity, and the heat dissipation cavities are used to place lithium batteries; and two liquid storage bags, which are arranged on both sides of the inner cavity and on both sides of the plurality of heat dissipation parts, each of the liquid storage bags is in contact with the side surface of the corresponding heat dissipation part, wherein the two liquid storage bags and the heat dissipation parts are connected in series via a hose; The two liquid storage bags and the interlayer of the heat dissipation part are filled with dry water.

2. A lithium battery thermal management device based on dry water cooling according to claim 1, characterized in that: The interlayer of the heat dissipation part is a honeycomb structure.

3. The dry water cooling lithium battery thermal management device according to claim 1, characterized in that: A plurality of positioning posts are provided in the inner cavity of the shell, and two adjacent heat dissipation parts are in contact with each other through the positioning posts.

4. A thermal management device for lithium batteries based on dry water cooling according to claim 3, characterized in that: A graphene plate is arranged between the positioning column and the heat dissipation portion.

5. The dry water cooling lithium battery thermal management device according to claim 1, characterized in that: The heat dissipation unit includes: The heat dissipation substrate is composed of side walls and a bottom wall, and a positioning groove is provided on the inner side surface thereof; and a heat dissipation plate, both sides of which are provided with positioning protrusions that cooperate with the positioning grooves.

6. A lithium battery thermal management device based on dry water cooling according to claim 5, characterized in that: The interlayers of the heat dissipation substrate and the heat dissipation plate both have a honeycomb structure, and the heat dissipation substrate and the heat dissipation plate are connected via a quick-connect plug.

7. The dry water cooling lithium battery thermal management device according to claim 1, characterized in that: Both sides of the shell are provided with accommodating cavities corresponding to the liquid storage capsules; An extrusion plate is provided between the liquid storage bag and the side wall of the accommodating cavity; An adjusting member is threadedly connected to the shell, and an end portion thereof passes through the shell and is movably connected to the extrusion plate.

8. The dry water cooling lithium battery thermal management device according to claim 1, characterized in that: An air inlet is provided at the bottom of the shell; A heat dissipation fan is provided at the bottom of the heat dissipation portion, and the heat dissipation fan is located at the air inlet; The cover plate is provided with an air outlet; A pressure plate, which is suitable for covering the air outlet; a rotating seat, which is arranged on the cover plate; The connecting plate has a middle portion hinged to the rotating seat, one end of the connecting plate is connected to the pressing plate, and a first elastic member is provided between the other end and the cover plate.

9. The dry water cooling lithium battery thermal management device according to claim 1, characterized in that: The heat dissipation portion close to the side wall of the shell is connected to the inner side wall of the shell through a second elastic member.

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