CN217541265U

CN217541265U - Battery drying device

Info

Publication number: CN217541265U
Application number: CN202220711272.2U
Authority: CN
Inventors: 姚煜; 张海波; 李超; 殷晓丰
Original assignee: Microvast Power Systems Huzhou Co Ltd
Current assignee: Microvast Power Systems Huzhou Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-10-04
Anticipated expiration: 2032-03-29

Abstract

The utility model provides a battery drying device, including box, hollow support and heating device, be equipped with phase change material in the support, heating device is used for right in the support phase change material heats. The utility model discloses utilize phase change material to carry out gas-liquid circulation in the support, can be fast with each position of heat conduction to the box in, not only improved heating efficiency, improved the temperature homogeneity of each position department inside the box moreover.

Description

Battery drying device

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a battery drying device is related to.

Background

With the rapid development of the new energy automobile industry, the power battery as the heart of the electric automobile becomes a research hotspot. The lithium ion battery has the advantages of high voltage, high specific energy, good cycle performance, cleanness, no pollution and the like, and is widely applied to the field of electric automobiles.

Because moisture has a great influence on the service performance and safety of the battery, the drying of the battery core is an essential part in the production process of the battery. The common electric core drying mode is hot air drying, and in the hot air drying process, if the evaporation speed of the moisture on the surface of the electric core is less than the speed of the moisture moving from the inside to the surface, a boundary layer water film is easy to break, so that the outer surface of the power battery is hardened and cracked. Therefore, in the prior art, the battery core is generally dried by using a vacuum drying device, and in a vacuum environment, the surface hardening phenomenon is solved, and moisture in the battery core can freely migrate to the outer surface to complete vaporization.

The existing vacuum drying device generally adopts an electric heating mode, so that the heating efficiency is low, and the problem of uneven temperature exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery drying device utilizes phase change material to carry out gas-liquid circulation in the support, can be fast with each position of heat conduction to the box in, has not only improved heating efficiency, has improved the temperature homogeneity of each position department inside the box moreover.

An embodiment of the utility model provides a battery drying device, including box, hollow support and heating device, be equipped with phase change material in the support, heating device is used for right in the support phase change material heats.

The support comprises a heat conduction frame and a recovery heating groove, the recovery heating groove is communicated with the heat conduction frame, and the heat conduction frame is located in the box body.

In an implementable manner, the recovery heating tank and the heating device are located in the box body, and the heating device heats the recovery heating tank to heat the phase change material.

In an implementable manner, the recovery heating tank and a heating device are located outside the tank, the heating device heating the recovery heating tank to effect heating of the phase change material.

In an implementation manner, the recycling heating tank is located at the bottom of the bracket, the phase-change material is disposed in the recycling heating tank, and the heating device is used for heating the recycling heating tank.

In an implementable manner, the heating device is in contact with the recovery heating tank to effect heating of the phase change material within the scaffold.

In an achievable form, the volume of the phase change material within the recovery heating tank is no more than 3/4 of the volume of the recovery heating tank.

In an implementation manner, the bracket further comprises a return pipe, and two ends of the return pipe are respectively communicated with the heat conduction frame and the recovery heating groove.

In an implementable manner, the heating means comprises a heating plate disposed below the recovery heating tank.

In an achievable form, the heating plate is attached to the bottom wall of the recovery heating tank.

In an implementation manner, the heat conducting frame comprises a plurality of horizontal pipes arranged horizontally and a plurality of vertical pipes arranged vertically, and the heat conducting frame is formed by mutually intersecting and communicating the plurality of horizontal pipes and the plurality of vertical pipes.

In an implementation mode, the plurality of transverse pipes are divided into a plurality of layers along the vertical direction, every two adjacent layers of transverse pipes are arranged at intervals up and down, and the plurality of layers of transverse pipes divide the internal space of the box body into at least two layers of accommodating spaces.

In a realizable mode, a heat-conducting plate for placing the battery material to be dried is arranged on the transverse tube.

In an implementation manner, the heat conducting plate is provided with a groove, and the transverse tube is embedded in the groove.

In an implementable manner, a heat conducting glue is arranged between the heat conducting plate and the transverse tube.

In one realizable approach, the phase change material is a low boiling point liquid with a boiling point between 20 ℃ and 150 ℃.

In an achievable form, the interior of the stent is under-pressure.

In one implementable manner, the battery drying device further comprises a vacuum pump and a vacuum pressure sensor, the vacuum pump being located outside the tank and in communication with the tank.

In an implementable manner, the vacuum pump is configured to evacuate the interior of the tank, and the vacuum pressure sensor is disposed within the tank.

In one form, a temperature sensor is provided within the tank.

The utility model provides a battery drying device, through set up phase change material in hollow support, utilize heating device to heat phase change material, phase change material vaporizes into the gaseous state by the liquid state after rising the temperature, gaseous phase change material can fill each position in the support rapidly; gaseous phase change material can dispel the heat fast when the liquefaction to conduct the heat to each position in the box fast, utilize phase change material to carry out gas-liquid circulation in the support promptly, realize that the box is inside to heat up fast evenly, not only improved heating efficiency, improved the temperature homogeneity of each position department in the box moreover.

Drawings

Fig. 1 is a schematic diagram of an internal structure of a battery drying device according to an embodiment of the present invention.

Fig. 2 is a schematic view of a connection structure between the heat-conducting frame and the heat-conducting plate in fig. 1.

Fig. 3 is a schematic structural diagram of the heat conductive frame in fig. 2.

Fig. 4 is a bottom view of the heat conductive plate of fig. 2.

Fig. 5 is a schematic view of an internal structure of a battery drying device according to another embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms of orientation of the upper, lower, left, right, front, back, top, bottom, etc. (if any) referred to in the specification and claims of the present invention are defined as the positions of the structures in the drawings and the positions of the structures relative to each other, and are only for the sake of clarity and convenience in describing the technical solutions. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

As shown in fig. 1, an embodiment of the utility model provides a battery drying device, including box 1, hollow support 2 and heating device 3, support 2 sets up in box 1, is equipped with phase change material in the support 2, and heating device 3 is used for heating the phase change material in the support 2. The bracket 2 comprises a heat conduction frame 21 and a recovery heating groove 22, the recovery heating groove 22 is communicated with the heat conduction frame 21, and the heat conduction frame 21 is positioned in the box body 1.

As shown in fig. 1, as an embodiment, the support 2 is used for placing a battery material to be dried, the battery material to be dried includes components such as a battery cell, the battery material to be dried is placed in the cell tray 6, and the cell tray 6 is placed on the support 2. The recovery heating tank 22 and the heating device 3 are located in the box body 1, and the heating device 3 heats the recovery heating tank 22 to heat the phase-change material.

As shown in fig. 5, as another embodiment, the recovery heating tank 22 and the heating device 3 are located outside the box 1, and the heating device 3 heats the recovery heating tank 22 to heat the phase change material.

Specifically, in the present embodiment, a phase-change material is disposed in the hollow support 2, and is heated by the heating device 3, the phase-change material is vaporized from a liquid state to a gaseous state after being heated, and the gaseous phase-change material can rapidly fill various positions in the support 2; gaseous phase change material can dispel the heat fast when the liquefaction to conduct each position in the box 1 with the heat fast, in order to treat dry battery material and heat the drying, the phase change material after the liquefaction gets back to 2 bottoms of support and heats the vaporization once more for the gaseous state, utilize phase change material to carry out gas-liquid circulation in support 2 promptly, realize 1 inside rapid uniformly of box and heat up, not only improved heating efficiency, but also improved the temperature homogeneity of 1 inside each position department of box.

As an embodiment, the phase change material is a low boiling point liquid with a boiling point in the range of 20 ℃ to 150 ℃. The low boiling point liquid can be non-flammable liquid such as water, ammonia water, perfluorohexanone, dichloromethane, carbon tetrachloride, bromopropane and the like.

In one embodiment, the interior of the stent 2 is formed into a negative pressure state by evacuation. The interior of the bracket 2 is vacuumized, so that a negative pressure state is formed in the interior of the bracket 2, the obstruction of air and pressure in the interior of the bracket 2 to the diffusion of the gaseous phase-change material is reduced, the phase-change material can be rapidly filled in each position in the bracket 2 when the temperature is raised and vaporized from the liquid state to the gaseous state, and the damage caused by the expansion of the bracket 2 is avoided (when the temperature is raised and vaporized from the liquid state to the gaseous state, the internal pressure of the bracket 2 can be increased; if the interior of the bracket 2 is not vacuumized, the vaporization and diffusion of the phase-change material can be obstructed, and the expansion damage of the bracket 2 can also be caused). Meanwhile, the negative pressure in the bracket 2 can also reduce the boiling point of the phase-change material, so that the phase-change material can be quickly vaporized.

As shown in fig. 1, as an embodiment, a heating device 3 is in contact with the bottom of the support 2 to heat the phase change material in the support 2.

As shown in fig. 1, as an embodiment, the bracket 2 includes a heat conduction frame 21 and a recovery heating tank 22, the size of the heat conduction frame 21 matches with the size of the internal space of the box 1, the recovery heating tank 22 is disposed corresponding to the bottom of the heat conduction frame 21, and the recovery heating tank 22 is communicated with the heat conduction frame 21 to form a closed space. The phase change material is disposed in the recovery heating tank 22, and the heating device 3 is used to heat the recovery heating tank 22.

Specifically, the recovery heating tank 22 is used for containing the phase change material, the recovery heating tank 22 is of a sealed box structure, and the phase change material can be subjected to gas-liquid circulation conversion in a closed space formed by communication between the recovery heating tank 22 and the heat conducting frame 21. When the heat recovery and heat treatment device works, the heating device 3 heats the recovery and heat treatment tank 22, so that the liquid phase change material in the recovery and heat treatment tank 22 is heated and vaporized into a gaseous state, the gaseous phase change material enters the heat conduction frame 21 and then rises along the inner channel of the heat conduction frame 21, and finally reaches each position in the heat conduction frame 21, and therefore the inner space of the box body 1 is rapidly and uniformly heated.

As shown in fig. 1, the heating device 3 is in contact with the recovery heating tank 22 to heat the recovery heating tank 22.

In one embodiment, the inside of the sealed space formed by the communication between the recovery heating tank 22 and the heat transfer frame 21 is in a negative pressure state.

In one embodiment, the volume of the phase change material in the recovery heating tank 22 is not more than 3/4 of the volume of the recovery heating tank 22 (i.e., the height of the liquid level of the phase change material in the recovery heating tank 22 is not more than 3/4 of the depth inside the recovery heating tank 22).

As shown in fig. 1, as an embodiment, the bracket 2 further includes a return pipe 23, and both ends of the return pipe 23 are respectively communicated with the heat conducting frame 21 and the recovery heating tank 22. The vaporized gaseous phase-change material in the recovery heating tank 22 can enter the heat conduction frame 21 through the return pipe 23, and the liquefied liquid phase-change material in the heat conduction frame 21 can also return to the recovery heating tank 22 through the return pipe 23.

As shown in fig. 1 and fig. 2, as an embodiment, one end of the return pipe 23 is fixedly connected to the heat conducting frame 21, the other end of the return pipe 23 passes through the recovery heating tank 22 and then extends into the recovery heating tank 22, and the return pipe 23 is hermetically connected to both the heat conducting frame 21 and the recovery heating tank 22.

As shown in fig. 1, the heating device 3 includes a heating plate 31, both the heating plate 31 and the recovery heating tank 22 are flat, the heating plate 31 is disposed below the recovery heating tank 22, and the heating plate 31 is attached to the bottom wall of the recovery heating tank 22. The heating device 3 may be an electric heating device, a hot oil heating device, an electromagnetic heating device, or the like.

As shown in fig. 2 and 3, in one embodiment, the heat conducting frame 21 includes a plurality of horizontal pipes 211 arranged horizontally and a plurality of vertical pipes 212 arranged vertically, the heat conductive frame 21 is formed by a plurality of horizontal pipes 211 and a plurality of vertical pipes 212 which are in cross communication with each other.

As shown in fig. 1 to fig. 3, as an embodiment, the plurality of transverse pipes 211 are divided into a plurality of layers along the vertical direction, each two adjacent layers of transverse pipes 211 are arranged at an interval from top to bottom, the plurality of layers of transverse pipes 211 divide the internal space of the box body 1 into at least two layers of accommodating spaces 11 at intervals from top to bottom, and each layer of accommodating space 11 is used for accommodating a battery material to be dried, a recovery heating groove 22 and other devices, so as to facilitate the arrangement and the arrangement of components.

As shown in fig. 1 to 3, as an embodiment, the plurality of horizontal pipes 211 are divided into four layers in the vertical direction, the four layers of horizontal pipes 211 divide the internal space of the box body 1 into three layers of accommodating spaces 11 spaced up and down, the recovery heating tank 22 and the heating plate 31 are disposed in the lowermost accommodating space 11, and the cell trays 6 can be placed in the intermediate and uppermost accommodating spaces 11.

As shown in fig. 3, as an embodiment, the heat conducting frame 21 includes four vertical pipes 212 arranged at intervals, the multiple horizontal pipes 211 include multiple first horizontal pipes 211a and multiple second horizontal pipes 211b, two ends of each first horizontal pipe 211a are respectively connected to the two corresponding vertical pipes 212, and two ends of each second horizontal pipe 211b are respectively connected to the two corresponding first horizontal pipes 211 a.

As shown in fig. 1 and 2, in one embodiment, a heat conducting plate 24 for placing the battery material to be dried is disposed on the horizontal tube 211. Through setting up heat-conducting plate 24, not only can make electric core tray 6 place steadily on heat conduction frame 21, can increase electric core tray 6 and heat conduction frame 21's area of contact moreover, improved heating efficiency, promoted electric core tray 6's heating homogeneity simultaneously.

In one embodiment, the thermally conductive plate 24 is an aluminum plate. Of course, in other embodiments, the plate 24 may be made of other heat conductive materials (e.g., steel).

As shown in fig. 2 and 4, in one embodiment, the heat conducting plate 24 is provided with a groove 241, and the horizontal tube 211 is embedded in the groove 241, so that the contact area between the heat conducting plate 24 and the heat conducting frame 21 is increased, and the heat transfer efficiency between the heat conducting plate 24 and the heat conducting frame 21 is improved.

In one embodiment, a heat conductive glue (not shown) is disposed between the heat conductive plate 24 and the horizontal tube 211, and fills a gap between the heat conductive plate 24 and the horizontal tube 211, which is located at the groove 241 where the heat conductive plate 24 and the horizontal tube 211 are engaged, so as to further improve the heat transfer efficiency between the heat conductive plate 24 and the heat conductive frame 21.

As shown in fig. 1, the battery drying apparatus further includes a vacuum pump 4 and a vacuum pressure sensor (not shown), and the vacuum pump 4 is located outside the case 1 and is communicated with the case 1. The vacuum pressure sensor is arranged on the inner wall of the box body 1 and close to the heat conducting frame 21, and the vacuum pressure sensor is used for detecting the pressure inside the box body 1.

Specifically, vacuum pump 4 is used for to the inside evacuation of box 1 (can also be to the inside dehumidification of box 1), makes the inside negative pressure state that is of box 1 to reduce the boiling point of water, make the moisture rapid vaporization who treats dry battery material surface volatilize, improve the inside thermal conduction rate of box 1 simultaneously, and then improve drying efficiency.

As shown in fig. 1, as an embodiment, a temperature sensor 5 is provided in the case 1, the temperature sensor 5 is provided on an inner wall of the case 1, and the temperature sensor 5 is used to detect the temperature inside the case 1.

As shown in fig. 1, as an embodiment, the number of the temperature sensors 5 is plural, and the plural temperature sensors 5 are respectively disposed corresponding to the respective layers of the accommodating spaces 11.

As an embodiment, the box body 1 is provided with a heat preservation layer (not shown), the heat preservation layer can be heat preservation cotton, aerogel, a vacuum plate and the like arranged on the inner wall of the box body 1, and the heat preservation layer can reduce the heat dissipation inside the box body 1, so as to improve the drying efficiency.

The embodiment of the utility model provides a still provide a manufacturing method of support 2, this manufacturing method of support 2 includes:

a valve port (not shown) is arranged on the bracket 2, and the inside of the bracket 2 is vacuumized through the valve port on the bracket 2;

phase change material is injected into the bracket 2 through a valve port on the bracket 2, and the valve port is closed after the injection of the phase change material is finished.

As an embodiment, the bracket 2 includes a heat conduction frame 21 and a recovery heating tank 22, the recovery heating tank 22 is disposed corresponding to the bottom of the heat conduction frame 21, and the recovery heating tank 22 is communicated with the heat conduction frame 21, the phase change material is injected into the bracket 2 through a valve port on the bracket 2, and the valve port is closed after the injection of the phase change material is completed, which specifically includes:

the phase-change material is injected into the recovery heating tank 22 through the valve port on the bracket 2, and the valve port is closed after the volume of the phase-change material in the recovery heating tank 22 reaches 3/4 of the volume of the recovery heating tank 22.

The specific work flow of the battery drying device in the embodiment is as follows:

1. the battery material to be dried is placed in the cell tray 6, then, the battery core tray 6 is placed on the heat conducting plate 24;

2. sealing the box body 1, and vacuumizing the interior of the box body 1 by using a vacuum pump 4;

3. the heating temperature is set to be 50-150 ℃, the heating device 3 starts to work, and the heating device 3 heats the phase-change material in the recovery heating tank 22. The phase-change material in the recycling heating tank 22 is heated to the boiling point and then vaporized into a gaseous phase-change material, the gaseous phase-change material enters the heat conduction frame 21 and then rises along the internal channel of the heat conduction frame 21, and the heat is conducted to the inside of the whole box body 1 through the heat conduction frame 21, so that the internal space of the box body 1 is rapidly and uniformly heated; the gaseous phase-change material is condensed into a liquid phase-change material when meeting the condensation, and then flows back to the recovery heating tank 22 through the return pipe 23, so that the phase-change material is subjected to gas-liquid circulation in the bracket 2. After the temperature in the box body 1 rapidly reaches a set value, the pressure of the upper half part in the box body 1 is always equal to the saturated vapor pressure at the current temperature, and a dynamic balance is kept between liquid water and gaseous water in the box body 1, so that the temperature in the whole box body 1 is uniform, and the specific temperature in the box body 1 is displayed by the temperature sensor 5. Meanwhile, the temperature inside the case 1 can be controlled to be increased or decreased by controlling the heating temperature of the heating device 3.

The embodiment of the utility model provides a battery drying device, through set up phase change material in hollow support 2, utilize heating device 3 to heat phase change material, phase change material vaporizes into the gaseous state by the liquid state after rising the temperature, and gaseous phase change material can fill each position in support 2 rapidly; gaseous phase change material can dispel the heat fast when the liquefaction to conduct heat to each position in the box 1 fast, in order to treat dry battery material and carry out the drying by heating, the phase change material after the liquefaction gets back to 2 bottoms of support again and heats the vaporization for gaseous state once more, utilizes phase change material to carry out gas-liquid circulation in support 2 promptly, realizes 1 inside rapid and even intensification of box, has not only improved heating efficiency, has improved the temperature homogeneity of 1 inside each position department of box moreover.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The battery drying device is characterized by comprising a box body (1), a hollow support (2) and a heating device (3), wherein a phase-change material is arranged in the support (2), and the heating device (3) is used for heating the phase-change material in the support (2).

2. The battery drying apparatus according to claim 1, wherein the bracket (2) includes a heat conducting frame (21) and a recovery heating tank (22), the recovery heating tank (22) being in communication with the heat conducting frame (21), the heat conducting frame (21) being located within the case (1).

3. The battery drying apparatus according to claim 2, wherein the recovery heating tank (22) and the heating device (3) are both located within the case (1), the heating device (3) being configured to heat the recovery heating tank (22) to achieve heating of the phase change material.

4. The battery drying apparatus according to claim 2, wherein the recovery heating tank (22) and the heating device (3) are both located outside the case (1), and the heating device (3) is used for heating the recovery heating tank (22) to heat the phase change material.

5. The battery drying apparatus according to claim 3 or 4, wherein the heating means (3) is in contact with the recovery heating tank (22) to effect heating of the recovery heating tank (22).

6. The battery drying apparatus according to claim 3 or 4, wherein the recovery heating tank (22) is located at the bottom of the rack (2), the phase change material is disposed in the recovery heating tank (22), and the heating device (3) is configured to heat the recovery heating tank (22).

7. The battery drying apparatus according to claim 6, wherein the volume of the phase change material in the recovery heating tank (22) is not more than 3/4 of the volume of the recovery heating tank (22).

8. The battery drying apparatus according to claim 3 or 4, wherein the bracket (2) further comprises a return pipe (23), and both ends of the return pipe (23) are respectively communicated with the heat conductive frame (21) and the recovery heating tank (22).

9. The battery drying apparatus according to claim 3 or 4, wherein the heating means (3) comprises a heating plate (31), the heating plate (31) being disposed below the recovery heating tank (22).

10. The battery drying apparatus according to claim 9, wherein the heating plate (31) is attached to a bottom wall of the recovery heating tank (22).

11. The battery drying apparatus according to claim 2, wherein the heat conducting frame (21) comprises a plurality of horizontal pipes (211) arranged horizontally and a plurality of vertical pipes (212) arranged vertically, and the heat conducting frame (21) is formed by a plurality of the horizontal pipes (211) and a plurality of the vertical pipes (212) communicating with each other in a crossing manner; many violently pipe (211) divide into the multilayer along vertical direction, every adjacent two-layer violently pipe (211) interval sets up from top to bottom, and the multilayer violently pipe (211) will the inner space of box (1) is for at least two-layer accommodation space (11).

12. Battery drying apparatus according to claim 11, characterized in that the cross tube (211) is provided with a heat conducting plate (24) for placing the battery material to be dried.

13. The battery drying apparatus of any of claims 1-4, wherein the phase change material is a low boiling point liquid having a boiling point in the range of 20 ℃ to 150 ℃.

14. Battery drying apparatus according to any of claims 1-4, characterised in that the inside of the holder (2) is under negative pressure.

15. The battery drying apparatus according to any one of claims 1 to 4, further comprising a vacuum pump (4), wherein the vacuum pump (4) is located outside the case (1) and communicates with the case (1).