CN218334008U - Heat dissipation casing and battery module - Google Patents

Abstract

The embodiment of the application provides a heat dissipation shell and a battery module, and relates to the field of batteries. The heat dissipation shell comprises a liquid cooling plate, a plurality of heat insulation sheets are vertically arranged on the upper surface of the liquid cooling plate, each heat insulation sheet comprises a heat pipe and two stacked VC temperature equalizing plates, and the heat pipe is arranged between the stacked VC temperature equalizing plates and is in surface contact with the two VC temperature equalizing plates; the liquid cooling plate and all the heat shields are enclosed to form a plurality of electric core limiting grooves for containing the electric core, and each electric core limiting groove is enclosed by the liquid cooling plate and two adjacent heat shields arranged face to form. The radiating shell in this embodiment can promote the radiating efficiency of electric core, can control the temperature of every electric core better, promotes the life of battery module.

Description

Heat dissipation casing and battery module

Technical Field

The application relates to the field of batteries, in particular to a heat dissipation shell and a battery module.

Background

The safety of the new energy vehicle at the present stage is an industry pain point and is mainly related to the thermal management performance of the battery. In the current new energy vehicles, the new energy vehicles adopt a stamping type liquid cooling plate scheme based on a power battery Pack CTP (Cell To Pack) structure. This kind of punching press formula liquid cooling board integrated into one piece only has roof and bottom plate, and the material generally uses the aluminum alloy, possesses the structural strength height, advantages such as thermal management efficiency height.

However, since the water cooling structure and the flow channel design of the conventional stamping liquid cooling plate are fixed, only one surface of the battery cell (generally, the bottom surface of the battery cell) can be contacted. The limited heat transfer ability that leads to of area of contact is limited, when meetting high-speed climbing and fill abominable operating mode such as soon, will lead to the difference in temperature of liquid cold plate very big, and this can directly influence the performance and the safety of electric core, the increase of aggravation new forms of energy car energy consumption to influence whole car dynamic property and continuation of the journey mileage, especially can't satisfy 4C and above high multiplying power electricity core demand of charging.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a heat dissipation casing and battery module, can promote the radiating efficiency of electric core, can control the temperature of every electric core better, promotes the life of battery module.

In a first aspect, an embodiment of the present application provides a heat dissipation housing, which includes a liquid cooling plate, wherein a plurality of heat insulation sheets are vertically arranged on an upper surface of the liquid cooling plate, each heat insulation sheet includes a heat pipe and two stacked VC temperature-equalizing plates, and the heat pipe is arranged between the stacked VC temperature-equalizing plates and is in surface contact with the two VC temperature-equalizing plates; the liquid cooling plate and all the heat shields are enclosed to form a plurality of electric core limiting grooves for containing the electric core, and each electric core limiting groove is enclosed by the liquid cooling plate and two adjacent heat shields arranged face to form.

In the implementation process, the cooling liquid in the liquid cooling plate flows rapidly, and the cooling effect can be achieved. The VC (Vapor Chamber) temperature equalizing plate and the heat pipe in the heat insulation sheet are both heat dissipation devices, the condensate inside the VC temperature equalizing plate can volatilize and absorb heat when being heated, and the heat pipe can fully utilize the heat conduction principle and the quick heat transfer property of the phase change medium. The heat insulation sheet formed by the cooperation of the VC temperature equalizing plate and the heat pipe can realize the effect of temperature reduction and can also guide heat into the liquid cooling plate.

In the embodiment of the application, when the heat dissipation casing during operation, electric core can be placed in electric core spacing groove, and great faces such as the side of electric core and bottom surface this moment can be direct and these heat sink contacts of heat insulating sheet and liquid cooling plate, and electric core spacing groove can cool down electric core well.

In one possible implementation, all the heat insulation sheets are arranged in a column, and adjacent heat insulation sheets in the same column are arranged oppositely.

In the implementation process, the heat insulation sheets are arranged in rows, so that the distribution of the electric core limiting grooves is more regular, and the integration of the electric core is facilitated.

In a possible implementation manner, all the heat insulation sheets in the same column are arranged at equal intervals, and the adjacent cell limiting grooves are separated by the same heat insulation sheet.

In the implementation process, the equal distance between the heat insulating sheets in the same column is arranged, and the adjacent electric core limiting grooves can be connected with the heat insulating sheets in a clamping manner through the clamping grooves in the same limiting block, so that the electric core is distributed more intensively, and the integration of the electric core is facilitated.

In a possible implementation manner, the upper surface of the liquid cooling plate is provided with paired limiting strips, the paired limiting strips are parallel to each other, two ends of each limiting strip are flush, and the two opposite ends of each heat insulation sheet are inserted into the paired limiting strips.

In above-mentioned realization in-process, spacing can provide the installation site for the heat shield, play the effect that the restriction heat shield removed, spacing can not prevent the heat on the heat shield in addition to transmitting in the liquid cooling board.

In a possible implementation manner, the upper surface part of the limiting strip is partially recessed downwards to form a clamping groove, and each heat insulation sheet is inserted into the limiting strip through the clamping groove.

In a possible implementation manner, the two opposite ends of the heat pipe extend outwards to form long-strip-shaped extension portions, the side edge of each extension portion, which is far away from the heat pipe, extends downwards to form an insertion strip, the insertion strips are matched with the clamping grooves, and each heat insulation sheet is inserted into the corresponding limiting strip through the insertion strips.

In the implementation process, the inserting strips on the extending parts on the heat pipes are matched with the clamping grooves, so that the inserting strips can be inserted into the clamping grooves, and the heat insulation sheets can be fixed on the inserting strips.

In one possible implementation, the VC vapor chamber is rectangular and the heat pipe is flat.

In the implementation process, the rectangular VC temperature-equalizing plate is the same as the mainstream battery core in shape, the battery core can be attached more, and the flat heat pipe is favorable for increasing the contact area between the heat pipe and the VC temperature-equalizing plate and improving the heat exchange efficiency.

In one possible implementation, the thickness of the VC uniform temperature plate is 0.25-0.5 mm.

In one possible implementation, an NTC temperature sensor for monitoring the temperature is provided inside each heat shield.

In the implementation process, the NTC (Negative Temperature Coefficient) Temperature sensor can monitor the Temperature of the heat insulation sheet, and provides a data basis for the prediction of the thermal runaway of the battery cell.

In a second aspect, an embodiment of the present application provides a battery module, which includes a plurality of battery cells and the above heat dissipation casing, where the battery cells correspond to the battery cell limiting grooves one to one, each battery cell is inserted into the corresponding battery cell limiting groove, and the battery cells respectively form surface contact with two adjacent heat insulation sheets and the liquid cooling plate.

At above-mentioned realization in-process, because electric core in the battery module is to insert one by one and locates electric core spacing groove, consequently every electric core can both obtain good cooling effect, and the battery module simple structure in the embodiment of this application, integrated level are high moreover, both easy to assemble, can reduce the volume of battery module again.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a heat dissipation housing according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a heat shield according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a liquid-cooled panel according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a battery module according to an embodiment of the present disclosure.

Icon: 001-a heat dissipation housing; 002-a battery module; 100-liquid cooling plate; 110-a stop bar; 111-card slot; 200-heat insulation sheets; 210-VC temperature-uniforming plates; 220-a heat pipe; 221-an extension; 222-a plug-in strip; 300-electric core limiting groove; and 400-battery cell.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when products of the application are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present application.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the 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 application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, detachable connections, or integral connections; 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 this application will be understood to be a specific case for those of ordinary skill in the art.

First embodiment

Referring to fig. 1 to 3, a heat dissipation housing 001 according to the present embodiment includes a liquid cooling plate 100 and a plurality of heat insulation sheets 200 vertically disposed on an upper surface of the liquid cooling plate 100; the liquid cooling plate 100 and the heat insulation sheet 200 form a plurality of cell limiting grooves 300 for accommodating the cells 400; every electric core spacing groove 300 is enclosed by liquid cooling board 100 and two adjacent and face-to-face heat shields 200 and establishes the formation, like this when electric core spacing groove 300 holding electric core 400, has liquid cooling board 100 and two heat shields 200 and electric core 400 to form the face contact, can reduce the thermal contact resistance among the indirect cooling system like this, promotes electric core 400's cooling efficiency in the at utmost. The term "a plurality of heat insulation sheets 200" means that the number of the heat insulation sheets 200 is not less than three, and thus, a plurality of cells 400 can be accommodated.

The liquid cooling plate 100 is a cooling device for cooling, and performs a cooling function by transferring excess heat through a circulating flow of a cooling liquid in a liquid flow channel. The parameters and shapes of the flow channels in the liquid cooling plate 100 can be optimized and arranged according to practical situations, and the present application is not limited thereto.

In addition, the opening mode of the water inlet and outlet of the liquid cooling plate 100 generally has a common normally open mode, a plus mode and the like, and because the heat dissipation shell 001 in the embodiment of the present application is mainly used in a module of a power battery, the opening degree of the water inlet and outlet pipe orifice can be adaptively adjusted according to the temperature degree of the battery by combining with actual driving conditions, such as high-speed climbing, high-power quick charging and the like, and an optimal heat pipe 220 management control strategy is implemented, which is not limited herein.

In this embodiment, the upper surface of the liquid cooling plate 100 is provided with the paired limiting strips 110, the paired limiting strips 110 are parallel to each other and have two parallel and level ends, so as to provide mounting points for the heat shield 200, and the heat shield 200 can be inserted on the paired limiting strips 110 to be fixed on the liquid cooling plate 100. In this case, the position limiting bar 110 is also provided in the form of the heat pipe 220, which does not prevent the heat of the heat insulating sheet 200 from being transferred to the liquid cooling plate 100. In addition, in order to ensure that each heat shield 200 can be fixed on the limiting strips 110, for example, the upper surfaces of the paired limiting strips 110 of the present embodiment are further recessed downward to form a plurality of slots 111 for clamping the heat shields 200, and each pair of slots 111 is butted against one heat shield 200.

In the embodiment of the present application, each thermal insulation sheet 200 includes two stacked VC temperature-uniforming plates 210 and a heat pipe 220, and the heat pipe 220 is located between the stacked VC temperature-uniforming plates 210 and is in surface contact with both of the two VC temperature-uniforming plates 210.

The VC temperature equalization plate 210 and the heat pipe 220 are both heat dissipation devices, when the VC temperature equalization plate 210 is heated, the internal condensate can volatilize and absorb heat, and the heat pipe 220 can fully utilize the heat conduction principle and the rapid heat transfer property of the phase change medium. The heat insulation sheet 200 formed by the cooperation of the VC temperature-uniforming plate 210 and the heat pipe 220 can not only realize the effect of temperature reduction, but also introduce heat into the liquid cooling plate 100, and the heat pipe 220 in this embodiment is fixed with the VC temperature-uniforming plate 210 by friction stir welding. The heat pipe 220 of this embodiment is usually made of red copper, brass or copper alloy, and has a thermal conductivity in the range of 8000-20000W/(m.K), such as 9000W/(m.K), 11000W/(m.K), 15000W/(m.K) and 19000W/(m.K). In the present embodiment, the heat pipe 220 is made of copper alloy, and has a thermal conductivity of 15000W/(m · K). The heat conductivity of the VC temperature equalization plate 210 is usually 16000-24000W/(m.K), and for example, 18000W/(m.K), 19000W/(m.K), 21000W/(m.K), 23000W/(m.K), the material is usually titanium alloy, the thickness is usually 0.25-0.5 mm, and for example, the thickness may be 0.3mm, 0.4mm, 0.45mm. Illustratively, the thermal conductivity of the VC temperature equalization plate 210 in this embodiment is 20000W/(m · K).

The arrangement of the heat insulating sheets 200 in this embodiment is as follows:

all heat shields 200 are arranged in a row, and adjacent heat shields 200 in the same row are arranged relatively, so that the distribution of the cell limiting grooves 300 is more regular, and the integration of the cell 400 is facilitated. In addition, in this embodiment, all the heat insulation sheets 200 in the same row are arranged at equal intervals, and the adjacent cell limiting grooves 300 are separated by the same heat insulation sheet 200; like this same heat shield 200 can participate in enclosing and establish two electric core spacing grooves 300 of formation, can make the distribution of electric core spacing groove 300 concentrate more like this, more is favorable to integrating of electric core 400.

Since the conventional battery cell 400 is a square battery cell 400, the VC temperature equalization plate 210 in this embodiment is rectangular to be more fit to the battery cell 400, and the heat pipe 220 is generally flat to increase a contact area between the heat pipe 220 and the VC temperature equalization plate 210. Furthermore, for example, in this embodiment, opposite ends of the heat pipe 220 may extend outward and form elongated extensions 221, a side of each extension 221 away from the heat pipe 220 may extend downward to form an insertion strip 222, the insertion strip 222 is matched with the slot 111, and each heat insulation sheet 200 is inserted on the paired limiting strips 110 through the insertion strip 222 for fixing the whole heat insulation sheet 200.

Of course, in some other embodiments, the limiting strip 110 may be inserted into the slot 111 by using structural heat conducting glue or brazing, and the description of the present application is omitted here.

In addition, in the present embodiment, an NTC temperature sensor (not shown) for monitoring temperature is further disposed inside each thermal insulation sheet 200, so as to provide a data basis for predicting the thermal runaway of the battery cell 400.

Second embodiment

As shown in fig. 1 to 4, the present embodiment provides a battery module 002, which includes a plurality of battery cells 400 and a heat dissipation housing 001 in the first embodiment, where the battery cells 400 correspond to the battery cell spacing grooves 300 one to one, each of the battery cells 400 is inserted into the corresponding battery cell spacing groove 300, and the battery cells 400 respectively form surface contact with two adjacent heat insulation sheets 200 and two adjacent liquid cooling plates 100.

In addition, as an example, in the present embodiment, the bottom surface of the battery cell 400 and the liquid cooling plate 100 are fixed by using a structural heat conducting adhesive.

Because electric core 400 in this embodiment is inserted one by one and is located electric core spacing groove 300 to the bottom and the side of electric core spacing groove 300 have formed the face contact, consequently every electric core 400 can both obtain good cooling effect, and battery module 002 in this embodiment simple structure, integrated level are high moreover, and both easy to assemble can reduce battery module 002's volume again.

The heat dissipating housing 001 of the first embodiment does not occupy additional space compared to existing stamped refrigeration plates. And the battery module 002 of the first embodiment (i.e. the battery module 002 of the second embodiment) is adopted, the heat conductivity coefficient is improved by 10 times, the uniformity of the temperature of each battery cell 400 is greatly ensured, the temperature difference of the battery cell 400 can be accurately controlled to 5 ℃ from the original 15 ℃, the service life of the battery cell 400 is correspondingly prolonged by 10%, and the temperature control time of the battery cell 400 is shortened to 1/3 of the original time.

The above embodiments are merely examples of the present application and are not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A heat dissipation shell is characterized by comprising a liquid cooling plate, wherein a plurality of heat insulation sheets are vertically arranged on the upper surface of the liquid cooling plate, each heat insulation sheet comprises a heat pipe and two stacked VC temperature equalizing plates, and the heat pipe is arranged between the stacked VC temperature equalizing plates and is in surface contact with the two VC temperature equalizing plates; the liquid cooling board and all the heat insulating pieces enclose and establish the electric core spacing groove that forms a plurality of and be used for the holding electric core, every the electric core spacing groove by the liquid cooling board encloses with two adjacent and face-to-face heat insulating pieces that set up and establishes the formation.

2. The heat-dissipating housing of claim 1, wherein all of the heat-dissipating fins are arranged in a row, and adjacent heat-dissipating fins in the same row are disposed opposite to each other.

3. The heat dissipation housing of claim 2, wherein all the heat insulation sheets in a same column are arranged at equal intervals, and adjacent cell limiting grooves are separated by the same heat insulation sheet.

4. The heat dissipation shell as recited in claim 1 or 2, wherein the upper surface of the liquid cooling plate is provided with a pair of limiting strips, the pair of limiting strips are parallel to each other and have two flush ends, and the opposite ends of each heat insulation sheet are inserted into the pair of limiting strips.

5. The heat dissipation shell as claimed in claim 4, wherein a part of the upper surface of the limiting strip is recessed downward to form a slot, and each of the heat insulation sheets is inserted into the limiting strip through the slot.

6. The heat dissipation housing as claimed in claim 5, wherein the opposite ends of the heat pipe extend outward and form elongated extensions, each of the extensions extends downward away from the side of the heat pipe to form an insertion strip, the insertion strip is matched with the slot, and each of the heat insulation sheets is inserted into the paired limiting strips through the insertion strip.

7. The heat dissipation housing of claim 1, wherein the VC vapor chamber is rectangular and the heat pipe is flat.

8. The heat dissipation casing of claim 1, wherein the VC uniform temperature plate has a thickness of 0.25-0.5 mm.

9. The heat-dissipating housing of claim 1, wherein each of the heat-dissipating fins is internally provided with an NTC temperature sensor for monitoring temperature.

10. A battery module, comprising a plurality of battery cells and the heat dissipation housing of any one of claims 1 to 9, wherein the battery cells correspond to the battery cell limiting grooves one to one, each battery cell is inserted into the corresponding battery cell limiting groove, and the battery cells respectively form surface contact with the two adjacent heat insulation sheets and the liquid cooling plate.

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