CN219086077U - Thermal management component and battery pack - Google Patents

Abstract

The disclosure provides a thermal management component and a battery pack, and relates to the field of batteries. The heat management component comprises a cold plate and a heating piece, wherein a cavity is arranged in the cold plate and used for accommodating a refrigerant; the heating element is wound or coated on the outer surface of the cold plate. The thermal management component can heat and cool the battery core, is convenient for carrying out thermal management on the battery core, has a compact structure and is beneficial to improving the space utilization rate.

Description

Thermal management component and battery pack

Technical Field

The utility model relates to the field of batteries, in particular to a thermal management component and a battery pack.

Background

The battery of the new energy automobile can work normally only in a certain temperature range, and the battery temperature is too high or too low, so that the normal operation of the battery is not facilitated, and the service life of the battery is shortened. Therefore, the battery needs to be cooled at high temperature and heated at low temperature.

At present, the common mode mainly comprises liquid cooling and liquid heating of the battery through a water cooling plate, but the mode has low heating efficiency and high energy consumption during liquid heating. Or, the water cooling plate is used for cooling liquid, and the heating film is used for heating, so that the heating film needs to be adhered, and the risk of falling off and dry burning of the heating film exists. Alternatively, a water cooling plate may be used for cooling and the PTC heater may be heated, but the PTC has a problem of heavy overall weight after packaging.

Disclosure of Invention

The utility model aims to provide a thermal management component and a battery pack, which can improve heating efficiency, are compact in structure, light in weight and small in size, and are beneficial to improving space utilization rate and thermal management efficiency.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides a thermal management component comprising:

the cooling plate is internally provided with a cavity for accommodating a refrigerant;

and the heating piece is wound or coated on the outer surface of the cold plate.

In an alternative embodiment, an insulating member is provided between the cold plate and the heat generating member.

In an alternative embodiment, the insulating member includes an insulating layer, and the insulating layer is provided on an outer surface of at least one of the cold plate and the heat generating member.

In an alternative embodiment, the insulating layer is at least one of an insulating paint and an insulating film.

In an alternative embodiment, the heating element comprises a heating wire, and the heating wire is wound on the outer surface of the cold plate.

In an alternative embodiment, the outer surface of the cold plate is convexly provided with a limiting piece.

In an alternative embodiment, the height of the limiting piece protruding out of the cold plate is higher than the height of the heating piece protruding out of the cold plate.

In an alternative embodiment, the limiting piece is provided with a through hole or a groove.

In a second aspect, the present utility model provides a battery pack comprising:

at least one thermal management component as in any one of the preceding embodiments;

a plurality of electrical cores; a plurality of the cells rest against the thermal management component.

In an alternative embodiment, a colloid is arranged between the battery cell and the cold plate, and the heating element is partially or completely immersed in the colloid.

The beneficial effects of the embodiment of the utility model include:

the heat management component provided by the embodiment of the utility model comprises a cold plate and a heating element, wherein a refrigerant can be arranged in the cold plate and used for cooling the battery cell. The surface of cold plate is equipped with the piece that generates heat, can be used to heat the electric core. The heat management component is directly arranged on the cold plate, has high integration level, compact structure, small volume and small occupied space, and is beneficial to improving the space utilization rate. In addition, the heating element is arranged on the outer surface of the cold plate, so that the heating efficiency is high, and the heat management efficiency is improved.

The battery pack provided by the embodiment of the utility model comprises the thermal management component, the battery core is abutted against the thermal management component, the cold plate can cool the battery core at high temperature, and the heating element can heat the battery core at low temperature, so that the thermal management of the battery core is effectively realized. And the structure is compact, the weight is light, the volume is small, the occupied space is small, and the space utilization rate is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a thermal management component according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a thermal management component according to an embodiment of the present utility model;

FIG. 3 illustrates an end structural schematic view of a cold plate of a thermal management component provided by an embodiment of the present utility model;

fig. 4 is a schematic view of a partial structure at a section A-A in fig. 2.

Icon: 100-thermal management components; 110-cold plate; 111-cavity; 112-separating ribs; 113-an inlet connection; 115-outlet connection; 120-an insulating layer; 150-heating element; 151-electrical connectors; 160-limiting sheets; 161-via.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: 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 utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, 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 direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "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; 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 utility model will be understood in specific cases by those of ordinary skill in the art.

The existing methods for carrying out heat management on the battery mainly comprise three methods, namely liquid cooling and liquid heating of the battery are realized by adopting a water cooling plate, and the defects of the method are low heating efficiency and high energy consumption during liquid heating. The second type adopts water cooling plate liquid cooling, adopts the heating film to heat, and this kind of mode needs to paste the heating film, has the risk that the heating film drops dry combustion method. And the third type adopts water cooling plate liquid cooling, and the PTC heater is heated, so that the PTC has the problem of heavy overall weight after encapsulation.

In order to overcome at least one defect in the prior art, the present embodiment provides a thermal management component 100, which can heat and cool the battery cell, and has compact structure, small volume, light weight and high thermal management efficiency.

Referring to fig. 1 to 4, the present embodiment provides a thermal management component 100, which includes a cold plate 110 and a heat generating element 150, wherein a cavity 111 is disposed in the cold plate 110, and the cavity 111 is used for accommodating a refrigerant; the cooling medium in the cavity 111 can cool down the battery cell. The heating element 150 is wound around or wrapped around the outer surface of the cold plate 110, and the heating element 150 can heat the battery cell. The thermal management component 100 is capable of heating and cooling the electrical core, facilitates thermal management of the electrical core, and has high thermal management efficiency. And the structure is compact, the volume is small, the weight is light, and the space utilization rate is improved.

An insulating member is arranged between the cold plate 110 and the heating member 150, the heating member 150 adopts an electric heating wire, and the arrangement of the insulating member can improve the safety. The insulating member may be integrally provided with the cold plate 110 or the heat generating member 150, or may be independently provided between the cold plate 110 and the heat generating member 150. Optionally, the insulating member includes an insulating layer 120, and an outer surface of at least one of the cold plate 110 and the heat generating member 150 is provided with the insulating layer 120. The insulating layer 120 employs at least one of an insulating paint and an insulating film. For example, the insulating layer 120 may be provided only on the outer surface of the cold plate 110, the insulating layer 120 may be provided only on the surface of the heat generating element 150, or the insulating layer 120 may be provided on each of the outer surface of the cold plate 110 and the outer surface of the heat generating element 150. In this embodiment, the outer surfaces of the cold plate 110 and the heat generating member 150 are insulated.

Optionally, the outer surface of the cold plate 110 is insulated. The outer surface of the cold plate 110 is coated with an insulating paint, and of course, the outer surface of the cold plate 110 may be coated with an insulating film. Wherein, the insulating material of the outer surface of the cold plate 110 meets the temperature-resistant requirement, and the bearable temperature is more than or equal to 65 ℃.

It can be appreciated that the cold plate 110 may be a profile structure, the cavity 111 therein is divided into a plurality of channels by the separation ribs 112, the channels can be used for flowing a cooling medium, the cooling medium can be water, oil or cold air, and the shape and the cross-sectional shape of the channels can be flexibly set, which is not particularly limited herein. The two ends of the cold plate 110 are respectively connected with an inlet joint 113 and an outlet joint 115, and the inlet joint 113 and the outlet joint 115 are respectively communicated with the cavity 111 in the cold plate 110 to realize the inlet and outlet of the refrigerant. In this embodiment, the flowing refrigerant passes through the cold plate 110, so that the cooling efficiency and the cooling uniformity can be improved, and the cooling effect is better.

The outer surface of the heat generating member 150 is also subjected to an insulation treatment. The heat generating member 150 includes a heating wire wound around the outer surface of the cold plate 110. The heating wire can be made of iron-chromium-aluminum heating wire and nickel-chromium heating wire, and the insulation treatment method of the heating wire is oxidation under high-temperature pure oxygen environment. In this embodiment, in order to further improve the safety, any one or more of epoxy resin paint, phenolic resin paint, silicone resin paint, and the like is impregnated on the surface of the heating wire.

Alternatively, the heat generating member 150 may be in a sheet shape or a wire shape, such as a heating wire or a heating sheet. The cross-sectional shape of the heat generating member 150 may be circular, elliptical, or any polygonal shape, or may be irregularly shaped, and is not particularly limited herein. The cross-sectional shape of the heat generating member 150 may be determined according to the actual heating power, and preferably, the whole thickness thereof is smaller after being wrapped around the cold plate 110, so that the volume can be reduced and the space utilization rate can be improved.

In this embodiment, the heating element 150 is a heating wire, and the cross section of the heating wire is rectangular. The heating wires are uniformly wound around the cold plate 110, that is, it is assumed that a plurality of turns of the heating wires are disposed along the length direction of the cold plate 110. The arrangement is high in heating efficiency and more uniform in heating. Of course, the heating wire may be wound along the longitudinal direction of the cold plate 110, or may be wound along the width direction of the cold plate 110. The winding density of the heating wires can be flexibly adjusted according to actual needs. The two ends of the heating wire are respectively provided with an electric connector 151, so that the heating wire can be conveniently electrified and heated.

Optionally, the outer surface of the cold plate 110 is convexly provided with a limiting piece 160. The limiting piece 160 is used for primarily limiting the heating wire. In this embodiment, the limiting plate 160 is disposed at intervals with the heating wires, and may be disposed at a gap between two adjacent turns of heating wires. The number of the limiting sheets 160 may be one or more, and if a plurality of limiting sheets 160 are provided, the plurality of limiting sheets 160 are uniformly distributed on the cold plate 110, so that the limiting effect on the heating wire can be improved. The limiting sheets 160 can be distributed on two opposite cooling large surfaces of the cold plate 110, namely, on two sides of the cold plate 110, so that the limiting of the heating wires on two sides of the cold plate 110 can be realized, and the structure is more stable.

Optionally, the height of the limiting piece 160 protruding from the cold plate 110 is higher than the height of the heat generating piece 150 protruding from the cold plate 110. In other words, the thickness of the limiting piece 160 is greater than that of the heating wire, so that the limiting effect on the heating wire is better. The limiting tab 160 and the cold plate 110 may be integrally formed or separately connected, including but not limited to adhesive, clamping, screw connection, welding, etc.

Optionally, the limiting plate 160 is provided with a through hole 161 or a groove. In this embodiment, the limiting plate 160 is rectangular and the limiting plate 160 is provided with the through hole 161, so that the weight of the limiting plate 160 can be reduced, thereby reducing the weight of the whole thermal management component 100. In addition, after the thermal management component 100 is applied to the battery pack, the colloid is filled between the cold plate 110 and the battery cell, and the colloid can be accommodated in the through hole 161 on the limiting piece 160, so that the filling amount of the colloid is increased, and the stability of the structure and the heat transfer efficiency are improved.

The embodiment of the utility model also provides a battery pack, which comprises a plurality of stacked battery cells and at least one thermal management component 100. The plurality of electrical cells rest against the thermal management component 100. The thermal management component 100 can be arranged between two adjacent rows of cells, that is, one thermal management component 100 can perform thermal management on two rows of cells at the same time, the thermal management efficiency is high, the structure is compact, and the temperature uniformity of heating and cooling is better.

Optionally, a colloid is disposed between the battery cell and the cold plate 110, and the heating element 150 is partially or completely immersed in the colloid. The colloid can adopt heat conduction glue or heat conduction structural glue, and the colloid can realize the bonding between the heat management component 100 and the battery cell, and has better structural stability, heat conduction and high heat exchange efficiency. In this embodiment, one end of the limiting plate 160 far away from the cold plate 110 is abutted against the battery cell, and the heating wire is completely immersed in the colloid. The heating wire directly transmits heat through the heat conducting colloid, so that the thermal resistance is reduced, and the heating efficiency is improved. In addition, the cold plate 110 also exchanges heat with the battery cell through colloid heat transfer, and the heat exchange efficiency is high.

In this embodiment, the heating wire is wound around the cold plate 110, which has a compact structure, a small volume, and a light weight, which is advantageous to improve the space utilization, and can achieve heating and cooling effects, and has a high thermal management efficiency. And, the heating wire is directly wound on the cold plate 110, the number of parts is reduced, the number of layers of external insulating films is reduced, the thermal resistance is reduced, the thermal efficiency is improved, and the heating rate is faster. In addition, the problem that the heating film is easy to fall off when being stuck in the prior art is solved.

In summary, the thermal management component 100 and the battery pack provided by the embodiments of the present utility model have the following beneficial effects:

the thermal management component 100 provided by the embodiment of the utility model has both heating and cooling functions. The heating element 150 is directly wound on the cold plate 110, so that the integrated level is high, the structure is compact, the volume is small, the occupied space is small, and the space utilization rate is improved. In addition, the heating element 150 is disposed on the outer surface of the cold plate 110, and has stable structure, high heating efficiency, and is beneficial to improving the heat management efficiency.

The battery pack provided by the embodiment of the utility model comprises the thermal management component 100, the battery core is abutted against the thermal management component 100, the cold plate 110 can cool the battery core at a high temperature, the heating element 150 can heat the battery core at a low temperature, and the thermal management of the battery core is effectively realized. And the structure is compact, the weight is light, the volume is small, the occupied space is small, and the space utilization rate is improved. The battery pack has the advantages of light overall weight, high heating and cooling efficiency and good temperature uniformity, and is favorable for improving the working stability and prolonging the service life.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A thermal management component, comprising:

the cooling plate is internally provided with a cavity for accommodating a refrigerant;

and the heating piece is wound or coated on the outer surface of the cold plate.

2. The thermal management component of claim 1, wherein an insulating member is disposed between the cold plate and the heat-generating member.

3. The thermal management component of claim 2, wherein the insulation comprises an insulation layer, the insulation layer being provided on an outer surface of at least one of the cold plate and the heat-generating component.

4. A thermal management component according to claim 3, wherein said insulating layer is at least one of an insulating paint and an insulating film.

5. A thermal management component according to claim 3, wherein the heat generating element comprises a heating wire wrapped around an outer surface of the cold plate.

6. The thermal management component of claim 1, wherein the outer surface of the cold plate is provided with a stop tab.

7. The thermal management component of claim 6, wherein the height of the spacing tab protruding from the cold plate is greater than the height of the heat generating element protruding from the cold plate.

8. The thermal management component of claim 6, wherein the spacing tab is provided with a through hole or a groove.

9. A battery pack, comprising:

at least one thermal management component as defined in any one of claims 1 to 8;

a plurality of electrical cores; a plurality of the cells rest against the thermal management component.

10. The battery pack of claim 9, wherein a gel is disposed between the cells and the cold plate, and the heat generating element is partially or completely immersed in the gel.

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