CN211295325U - Cooling device for battery pack and battery pack - Google Patents

Abstract

The utility model discloses a cooling device and battery package for battery package, cooling device includes: a heat exchange tube having an evaporation section and a condensation section; the cooling system comprises a heat dissipation cold plate, wherein the heat dissipation cold plate is provided with a cooling flow channel suitable for flowing of cooling liquid, the evaporation section is arranged close to the battery cell of the battery pack and used for absorbing heat of the battery cell, and the condensation section extends into the cooling flow channel so as to release the heat absorbed by the evaporation section to the cooling liquid. According to the utility model discloses a cooling device for battery package sets up heat exchange tube and heat dissipation cold drawing through electric core department at the battery package for the evaporation zone of heat exchange tube can absorb the heat of electric core fast, and emit the heat in the coolant liquid fast through the condensation segment, thereby improve electric core cooling rate, and electric core temperature can maintain reasonable scope, guarantees the security, reliability and the life of electric core, with the condition of dealing with future severer high temperature environment and high-power charging.

Description

Cooling device for battery pack and battery pack

Technical Field

The utility model relates to a vehicle technical field particularly, relates to a cooling device and battery package for battery package.

Background

At present, the service life of a power battery pack is usually improved through a liquid cooling technology, namely, a liquid cooling plate is arranged at the bottom of a battery module, and the battery pack is cooled through the contact of the bottom of the battery module and the upper end of the liquid cooling plate, so that the safety and the reliability of the power battery pack are improved; however, as the requirement of the vehicle on the environmental temperature is more stringent, and the application of the charging technology of the high-rate current increases the heat generation rate of the power battery pack, the current liquid cooling technology cannot meet the requirements on the cooling rate of the battery pack, the temperature difference between the battery cores and the like, the safety, the reliability and the service life of the power battery pack are affected, and there is room for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. For this reason, an object of the present invention is to provide a cooling device for a battery pack, which can improve the cooling rate of an electric core.

The utility model also provides a battery package.

According to the utility model discloses a cooling device for battery package of first aspect embodiment includes: a heat exchange tube having an evaporation section and a condensation section; the cooling system comprises a heat dissipation cold plate, wherein the heat dissipation cold plate is provided with a cooling flow channel suitable for flowing of cooling liquid, the evaporation section is arranged close to the battery cell of the battery pack and used for absorbing heat of the battery cell, and the condensation section extends into the cooling flow channel so as to release the heat absorbed by the evaporation section to the cooling liquid.

According to the utility model discloses a cooling device for battery package, locate to set up heat exchange tube and heat dissipation cold drawing through the electric core at the battery package, make the evaporation zone of heat exchange tube can the heat of quick absorption electric core, and emit the heat in the coolant liquid fast through the condensation segment, thereby improve electric core cooling rate, electric core temperature can maintain reasonable scope, guarantee the security of electric core, reliability and life, make electric core can deal with the condition of future severer high temperature environment and high-power charging from this.

According to the utility model discloses a cooling device for battery package, the heat exchange tube still has adiabatic section, adiabatic section is located the evaporation zone with between the condensation segment, just adiabatic section is located in the cooling runner.

According to the utility model discloses a cooling device for battery package, the condensation section is located the below of evaporation zone, the heat exchange tube still has the imbibition core, the medium in the condensation section passes through the imbibition core flows extremely the evaporation zone.

According to the utility model discloses a cooling device for battery package, be equipped with the mounting hole on the lateral wall of heat dissipation cold drawing, the heat exchange tube passes through the mounting hole stretches into the cooling runner, just the heat exchange tube with heat dissipation cold drawing sealing connection.

Optionally, the heat exchange tube is connected with the heat dissipation cold plate in a welding or glue sealing mode.

According to the utility model discloses a cooling device for battery package, the heat exchange tube is vertical pipe, the evaporation zone with the condensation segment is followed the axial of vertical pipe is arranged.

According to the utility model discloses a cooling device for battery package, the heat exchange tube is including vertical pipe section and horizontal pipe section, at least partly formation of vertical pipe section the evaporation zone, at least partly do of horizontal pipe section the condensation segment.

According to the utility model discloses a cooling device for battery package, the heat exchange tube is located one side of electric core, perhaps, the heat exchange tube clamp is established between two adjacent electric cores.

According to the utility model discloses a cooling device for battery package, cooling device still includes: the heat conduction piece is arranged close to the battery core of the battery pack, and the evaporation section of the heat exchange tube is arranged on the heat conduction piece.

According to the utility model discloses battery package of second aspect embodiment, include according to the utility model discloses a cooling device for battery package of first aspect embodiment, through adopting above-mentioned cooling device, the temperature of battery package can be maintained at reasonable scope, has guaranteed security, reliability and the life of battery package, makes the battery package can deal with the condition of future severer high temperature environment and high-power charging from this.

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

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a cooling device according to an embodiment of the present invention;

fig. 2 is a schematic view of an installation structure of a heat exchange pipe according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a cooling device according to another embodiment of the present invention;

FIG. 4 is a cross-sectional view of the embodiment shown in FIG. 3;

fig. 5 is a partial structural schematic diagram of the embodiment shown in fig. 3.

Reference numerals:

the cooling apparatus (100) is provided with a cooling device,

a heat exchange pipe 10, a vertical pipe section 101, a horizontal pipe section 102, an evaporation section 11, a condensation section 12, a heat insulation section 13,

a cold plate 20 for heat rejection, cooling channels 21, mounting holes 22,

the heat-conducting member 30 is provided with,

and a battery core 40.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A cooling device 100 for a battery pack according to an embodiment of the present invention is described below with reference to fig. 1 to 5.

As shown in fig. 1, a cooling device 100 for a battery pack according to an embodiment of the present invention includes: the heat exchange tube 10 and the heat dissipation cold plate 20, the heat exchange tube 10 has an evaporation section 11 and a condensation section 12, the heat dissipation cold plate 20 defines a cooling flow channel 21 suitable for flowing of a cooling liquid, wherein the evaporation section 11 is arranged adjacent to a battery cell 40 of a battery pack, the evaporation section 11 can absorb heat of the battery cell 40, a medium in the heat exchange tube 10 is gasified and evaporated after absorbing the heat and enters the condensation section 12, the condensation section 12 extends into the cooling flow channel 21, a gaseous medium is changed into a liquid state in the condensation section 12, and the heat is released into the cooling liquid in the cooling flow channel 21 for cooling and heat dissipation, so that the heat of the battery cell 40 is rapidly transferred into the cooling liquid through circulation, and rapid cooling of the battery cell 40 is realized.

According to the utility model discloses a cooling device 100 for battery package, locate to set up heat exchange tube 10 and heat dissipation cold drawing 20 through electric core 40 at the battery package, make the evaporation zone 11 of heat exchange tube 10 can absorb the heat of electric core 40 fast, and emit the heat in the coolant liquid fast through condensation segment 12, thereby promote electric core 40 cooling rate, electric core 40 temperature can be maintained in reasonable scope, guarantee electric core 40's security, reliability and life, make electric core 40 can deal with the condition that future severer high temperature environment and high-power charge from this.

According to an embodiment of the present invention, the heat exchange tube 10 further has a heat insulation section 13, the heat insulation section 13 is disposed between the evaporation section 11 and the condensation section 12, and the heat insulation section 13 is located in the cooling flow channel 21, when the battery cell 40 generates heat, the heat is firstly transferred to the evaporation section 11 of the heat exchange tube 10, the liquid medium in the evaporation section 11 is gasified and enters the condensation section 12 through the heat insulation section 13 to become liquid, the liquid medium in the condensation section 12 flows to the evaporation section 11 again, so as to circularly perform the above processes, the heat transfer process is continued until the temperature of the battery cell 40 is reduced to a proper range, and the safety and reliability of the battery cell 10 are ensured; through setting up adiabatic section 13 in cooling runner 21, both can increase evaporation zone 11 and absorb the heat of electric core 40, improve the cooling rate to electric core 40, can guarantee again that condensation segment 12 is located cooling runner 21 completely, avoid the heat to release outside the coolant liquid, further improved cooling rate.

According to the utility model discloses an embodiment, condensation segment 12 is located the below of evaporation zone 11, and heat exchange tube 10 still has the wick, and the evaporation zone 11 is got back to the siphon power that the medium in condensation segment 12 passes through the wick for medium circulation in the heat exchange tube 10, thereby the process of heat transfer can continue to go on, reduces suitable scope until the temperature of electric core 40.

The heat dissipation cold plate 20 is located at the lower side of the battery cell 40, and the lower surface of the battery cell 40 is in contact with the upper surface of the heat dissipation cold plate 20, so that the battery cell 40 is cooled synchronously through heat exchange, and the cooling rate of the battery cell 40 is further improved; and the structure has small change on the heat dissipation cold plate 20, low cost and convenient popularization and application.

Of course, the condensation section 12 may also be disposed above the evaporation section 11, and the heat dissipation cold plate 20 is disposed above the battery cell 40, so that the medium in the condensation section 12 can automatically flow to the evaporation section 11 under the action of gravity, thereby improving the efficiency of medium flow, and further improving the cooling rate of the battery cell 40.

As shown in fig. 4, according to the utility model discloses an embodiment, be equipped with mounting hole 22 on the lateral wall of heat dissipation cold drawing 20, heat exchange tube 10 can be through wearing to establish mounting hole 22 to stretch into cooling flow 21 in, the condensation segment 12 contacts in order to release the heat to the coolant liquid with the coolant liquid, wherein, heat exchange tube 10 and heat dissipation cold drawing 20 sealing connection, in order to guarantee that condensation segment 12 is located cooling flow 21 completely, avoid condensation segment 12 to release the heat outside the coolant liquid, avoided cooling rate's reduction.

In some specific examples, the heat exchange tube 10 and the heat dissipation cold plate 20 are hermetically connected in a welding manner, the welding tightness is good, the reliability is high, the heat exchange tube 10 can be connected in the heat dissipation cold plate 20 by glue sealing such as a binder and a sealant after being inserted, the sealing is reliable, the cost is low, and the popularization and the application are convenient.

According to the utility model discloses an embodiment, heat exchange tube 10 includes a plurality ofly, and a plurality of heat exchange tubes 10 are arranged along horizontal direction interval, and the certain distance in condensation section 12 interval of every heat exchange tube 10 to avoid inserting the cooling runner 21 in the back emergence and interfere.

In some specific examples, the extending direction of the cooling flow channel 21 is the length direction (front-back direction shown in fig. 3), the width direction (left-right direction shown in fig. 3) and the thickness direction (up-down direction shown in fig. 3) of the cooling flow channel 21 perpendicular to the length direction are respectively the width direction and the thickness direction, and the thickness and the width of the cooling flow channel 21 are greater than the pipe diameter of the heat exchange pipe 10, so that the insertion installation of the heat exchange pipe 10 is facilitated, and the heat dissipation effect is ensured.

As shown in fig. 1 and fig. 2, according to an embodiment of the present invention, the heat exchange tube 10 is a vertical tube, the evaporation section 11 and the condensation section 12 are arranged along the axial direction (the vertical direction shown in fig. 1) of the vertical tube, that is, the evaporation section 11 and the condensation section 12 are arranged along the vertical direction, and the evaporation section 11 is located above the condensation section 12, and the condensation section 12 extends into the heat dissipation cold plate 20 of the lower side of the electric core 40 to release heat into the cooling liquid. The evaporation section 11 is disposed on one side of the battery cell 10, or the evaporation section 11 is sandwiched between two battery cells 10, so as to absorb heat and cool the two battery cells 10, thereby reducing the cost and improving the cooling rate of the whole battery pack.

As shown in fig. 3-5, according to the utility model discloses an embodiment, heat exchange tube 10 forms L shape, heat exchange tube 10 includes vertical pipe section 101 and horizontal pipe section 102, a part of vertical pipe section 101 forms evaporation zone 11, horizontal pipe section 102 is located the below of vertical pipe section 101, a part of horizontal pipe section 102 is condensation segment 12, a part of vertical pipe section 101 lower extreme stretches into heat dissipation cold plate 20, the part that stretches into heat dissipation cold plate 20 forms adiabatic section 13, the part that is close to vertical pipe section 101 of horizontal pipe section 102 is adiabatic section 13, another part is condensation segment 12, condensation segment 12 extends along the extending direction (the fore-and-aft direction shown in fig. 3) of cooling runner 21, thereby can increase the length of condensation segment 12, in order to improve the heat release efficiency of condensation segment 12, and then the cooling rate of electric core 40 has been improved.

Of course, the heat exchange tube 10 may have other shapes to satisfy the effect of rapid heat conduction, and is not limited herein.

According to an embodiment of the present invention, the evaporation section 11 of the heat exchange tube 10 is disposed at one side of the battery cell 40 to rapidly absorb heat of the battery cell 40, so as to improve the cooling rate; in other embodiments, the evaporation section 11 of the heat exchange tube 10 is sandwiched between two adjacent battery cells 40 to absorb heat and cool two battery cells 10 simultaneously, so that the cost can be reduced, and the cooling rate of the whole battery pack can be increased.

According to the utility model discloses an embodiment, cooling device 100 still includes heat-conducting piece 30, and heat-conducting piece 30 is close to the electric core 40 of battery package and arranges, and the evaporation zone 11 of heat exchange tube 10 sets up on heat-conducting piece 30, and heat exchange tube 10 can be directly embedded in heat-conducting piece 30, also can integrative integration on heat-conducting piece 30, inject the pipeline in heat-conducting piece 30 for example, install the wick in the pipeline and fill shutoff behind the filling medium to simplify the structure, reduce the space that cooling device 100 occupy.

The heat conducting member 30 may be formed in a plate shape, for example, the heat conducting member 30 is a metal plate, the size of the metal plate may be adjusted according to the size of the battery cell 40, so that the metal plate is mounted on one side of the battery cell 40, or is sandwiched between two battery cells 40, and the evaporation section 11 is embedded or integrated on the heat conducting member 30, thereby increasing the heat absorption rate of the evaporation section 11 of the heat exchange tube 10, the heat exchange tube 10 may be one or more, and the condensation section 12 protrudes out of the bottom of the metal plate to extend into the cooling flow channel 21.

When electricity core 40 generates heat, the heat is at first transmitted to the metal sheet, the evaporation zone 11 of heat exchange tube 10 absorbs the heat on the metal sheet, make the liquid medium gasification in the heat exchange tube 10 form gaseous medium, gaseous medium flows to condensation segment 12, and in condensation segment 12 releases the heat to the coolant liquid, the realization is to the thermal quick release of electricity core 40, and gaseous medium forms liquid medium in condensation segment 12 department liquefaction, liquid medium gets back to evaporation zone 11 through the suction of the imbibition core in heat exchange tube 10, through the cooling of cooling device 100, the heat transfer process lasts, until the temperature of electricity core 40 reduces to reasonable scope.

According to the utility model discloses an embodiment, heat exchange tube 10, heat dissipation cold drawing 20 and heat-conducting piece 30 can adopt metals such as aluminium, copper, stainless steel or its alloy to form through various technology processing, satisfy certain heat transfer rate, pressure balance, cost, life design requirement such as can, do not limit here.

According to the utility model discloses battery pack, include according to the utility model discloses a cooling device 100 for battery pack, through adopting above-mentioned cooling device, the temperature of battery pack can be maintained at reasonable scope, guarantees security, reliability and the life of battery pack, makes the battery pack can deal with the condition that future severer high temperature environment and high-power charge from this.

The battery pack can be a hybrid power battery pack, and the battery pack can also be a battery pack for a new energy automobile, such as a power battery pack of a pure electric automobile; the cooling device 100 should be made of materials and manufactured with as low cost, light weight, and recyclable as possible; the cooling device 100 should also meet the requirements of specific use occasions such as working temperature, working pressure, service life and the like; furthermore, the cooling device 100 should meet the requirements of legislation in cooling systems for vehicles, for example in terms of hazardous substance content and recyclability.

Other constructions and operations of the battery pack according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features through another feature not directly in contact. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

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

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A cooling device (100) for a battery pack, comprising:

a heat exchange tube (10), the heat exchange tube (10) having an evaporation section (11) and a condensation section (12);

a heat sink cold plate (20), the heat sink cold plate (20) defining a cooling flow channel (21) adapted for a flow of a cooling liquid,

wherein the evaporation section (11) is arranged adjacent to the battery cells (40) of the battery pack and is used for absorbing heat of the battery cells (40), and the condensation section (12) extends into the cooling flow channel (21) to release the heat absorbed by the evaporation section (11) to the cooling liquid.

2. The cooling device (100) for battery packs according to claim 1, wherein the heat exchange pipe (10) further has a heat insulating section (13), the heat insulating section (13) is provided between the evaporation section (11) and the condensation section (12), and the heat insulating section (13) is located in the cooling flow channel (21).

3. The cooling device (100) for battery packs according to claim 1, characterized in that the condensation section (12) is located below the evaporation section (11), the heat exchange pipe (10) further having a wick through which the medium in the condensation section (12) flows to the evaporation section (11).

4. The cooling device (100) for battery packs as claimed in claim 1, wherein the heat sink cold plate (20) is provided with a mounting hole (22) on a side wall thereof, the heat exchange pipe (10) extends into the cooling flow channel (21) through the mounting hole (22), and the heat exchange pipe (10) is hermetically connected with the heat sink cold plate (20).

5. The cooling device (100) for battery packs, as claimed in claim 4, characterized in that the heat exchange tubes (10) are welded or glued to the heat sink cold plate (20).

6. The cooling device (100) for battery packs as claimed in claim 1, wherein the heat exchange tubes (10) are vertical tubes, and the evaporation section (11) and the condensation section (12) are arranged in the axial direction of the vertical tubes.

7. The cooling device (100) for battery packs according to claim 1, wherein the heat exchange tube (10) comprises a vertical tube section (101) and a horizontal tube section (102), at least a part of the vertical tube section (101) forming the evaporation section (11), at least a part of the horizontal tube section (102) being the condensation section (12).

8. The cooling device (100) for the battery pack according to claim 1, wherein the evaporation section (11) of the heat exchange tube (10) is arranged on one side of the battery cell (40), or the evaporation section (11) of the heat exchange tube (10) is sandwiched between two adjacent battery cells (40).

9. The cooling device (100) for a battery pack according to any one of claims 1 to 8, wherein the cooling device (100) further comprises: the heat conduction piece (30), the heat conduction piece (30) is close to the battery core (40) of the battery pack and is arranged, and the evaporation section (11) of the heat exchange pipe (10) is arranged on the heat conduction piece (30).

10. A battery pack, characterized by comprising a cooling device (100) for a battery pack according to any one of claims 1-9.

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