CN219759726U - Monomer liquid cooling module, battery box and battery package - Google Patents

Abstract

The utility model discloses a monomer liquid cooling module, a battery box body and a battery pack, which belong to the technical field of power batteries, wherein the monomer liquid cooling module comprises a cuboid hollow liquid cooling body, the liquid cooling body is provided with a cooling cavity and a profile cavity which are distributed along the thickness direction, the cooling cavity comprises a first subchamber and a second subchamber which are arranged along the length direction of the liquid cooling body in an extending manner and are mutually communicated, inner fins are respectively fixedly arranged in the first subchamber and the second subchamber, and the top surface of the liquid cooling body is provided with a liquid inlet communicated with the first subchamber and a liquid outlet communicated with the second subchamber. The monomer liquid cooling module, the battery box body and the battery pack provided by the utility model have lower cost.

Description

Monomer liquid cooling module, battery box and battery package

Technical Field

The utility model relates to the technical field of power batteries, in particular to a monomer liquid cooling module, a battery box body and a battery pack.

Background

The temperature has a great influence on the overall performance of the power battery, wherein the main influences are three aspects of the electrical performance, the service life of the battery cell and the thermal runaway safety of the power battery. Therefore, cooling of the battery pack of the power battery is particularly important.

Among the prior art, the battery package generally includes the box, and a plurality of batteries of installing in the box, and the cooling mode of battery adds the polylith liquid cooling board between the bottom plate of battery and box generally to, support through the bubble cotton between box bottom plate and the liquid cooling board, the liquid cooling board is general through bolted connection with the box, carries out the cluster/parallel connection through the water pipe between each liquid cooling board in the box. The liquid cooling plate is a closed cavity formed by metal with high heat conductivity coefficient, such as aluminum, and has a certain thickness, the liquid cooling plate indirectly transfers the heat generated by the battery to low-temperature cooling liquid in the cavity, and the temperature of the battery is reduced by cooling the circulated cooling liquid.

However, the foam needs to be arranged between the bottom plate of the box body and the liquid cooling plate, and the foam is expensive, so that the cooling cost is high, and the cost of the battery pack is high.

Disclosure of Invention

The utility model aims to provide a monomer liquid cooling module, a battery box body and a battery pack, which can have lower cost.

The technical scheme adopted by the utility model is as follows:

monomer liquid cooling module, including being cuboid form and hollow liquid cooling body, the liquid cooling body has cooling cavity and the section bar cavity of arranging along thickness direction, the cooling cavity includes along liquid cooling body length direction extends the first sub-chamber and the second sub-chamber of setting and mutual intercommunication, first sub-chamber with the second sub-intracavity has set firmly the inner fin respectively, just the top surface of liquid cooling body has the intercommunication the inlet and the intercommunication of first sub-chamber the liquid outlet of second sub-chamber

Optionally, the cooling chamber and the section chamber are formed by separating the partition plates in the liquid cooling body, the inner fins are of rectangular wavy structures, liquid cooling runners are respectively formed between the inner fins and the partition plates and between the inner fins and the top plate of the liquid cooling body, and the liquid cooling runners extend along the length direction of the liquid cooling body.

Optionally, the inner fins are respectively spaced from end plates at two ends of the liquid cooling body in the length direction.

Optionally, the first subchamber with the second subchamber is in through setting up the first baffle in the cooling chamber separates and forms, first baffle is followed the length direction of liquid cooling body extends, just the one end of first baffle with the end plate sealing connection of the first end of liquid cooling body, the other end of first baffle with the end plate interval setting of the second end of liquid cooling body is in order to form the intercommunication the liquid cooling runner of first subchamber with the second subchamber, the inlet with the liquid outlet all sets up the first end of liquid cooling body.

Optionally, the distance between the liquid inlet and the first end is greater than the distance between the liquid outlet and the first end; or, the distance between the liquid outlet and the first end is greater than the distance between the liquid inlet and the first end.

Optionally, the liquid cooling device further comprises a liquid inlet connector and a liquid outlet connector which are fixedly connected to the liquid cooling body respectively, wherein the liquid inlet connector is communicated with the liquid inlet, and the liquid outlet connector is communicated with the liquid outlet.

Optionally, a plurality of second baffles perpendicular to the liquid cooling body bottom plate are arranged in the section cavity, the second baffles are arranged in parallel along the length direction of the liquid cooling body, and the section cavity is divided into a plurality of third subchambers by the second baffles.

The battery box comprises a box bottom and a box side part arranged around the box bottom, wherein the box bottom comprises at least one monomer liquid cooling module.

Optionally, the monomer liquid cooling module is equipped with a plurality ofly, and a plurality of the liquid cooling body is arranged in proper order, and adjacent two weld between the liquid cooling body, a plurality of the liquid cooling body with weld between the box lateral part.

The battery pack comprises the battery box body and a plurality of battery modules, and the battery modules are adhered to the bottom of the box body through heat-conducting glue.

The utility model has the beneficial effects that:

the monomer liquid cooling module is used for cooling the liquid cooling runner integrated design of the battery module in the liquid cooling body, the liquid cooling body is of a double-layer cavity structure, the cavity of the upper layer is set to be a cooling cavity, the cavity of the lower layer is set to be a section bar cavity, the cooling cavity can form the liquid cooling runner, so that cooling liquid can flow in the liquid cooling body, and the structure for forming the battery box is multiplexed to form the liquid cooling runner, so that an independent liquid cooling plate is not required to be additionally arranged in the battery box, and structures such as foam are not required to be arranged, and the cost of the monomer liquid cooling module is lower, thereby reducing the cooling cost of a battery pack.

Drawings

FIG. 1 is a schematic diagram of a liquid cooling body according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a liquid cooling body according to a first embodiment of the present utility model;

FIG. 3 is a schematic diagram of a liquid cooling body without a side plate according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a liquid cooling body according to a first embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a liquid cooling body according to an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of the utility model at A shown in FIG. 5;

FIG. 7 is a schematic view of an inner fin according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a battery case according to a second embodiment of the present utility model;

fig. 9 is a schematic structural view of a battery pack according to a third embodiment of the present utility model;

fig. 10 is an exploded view of a battery pack according to a third embodiment of the present utility model.

In the figure:

1. a liquid cooling body; 11. a cooling chamber; 111. a first subchamber; 1111. a first flow passage; 112. a second subchamber; 1121. a second flow passage; 12. a profile cavity; 121. a third subchamber; 13. a liquid outlet; 2. an inner fin; 3. a partition plate; 4. a first separator; 5. a liquid inlet joint; 6. a liquid outlet joint; 7. a second separator; 8. a third separator; 9. a fourth separator;

10. the bottom of the box body; 20. a side part of the box body;

100. and a battery module.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

The embodiment provides a monomer liquid cooling module, which can have lower cost.

As shown in fig. 1 and 2, the monomer liquid cooling module includes a liquid cooling body 1 having a rectangular parallelepiped shape and hollow. Specifically, the liquid cooling body 1 includes a bottom plate, a top plate, and four side plates, and the bottom plate, the top plate, and the four side plates are hermetically connected to form the liquid cooling body 1 having a relatively sealed inner cavity.

Referring to fig. 2, the liquid cooling body 1 has cooling chambers 11 and profile chambers 12 arranged in the thickness direction thereof. Specifically, the cooling chamber 11 is located above the profile chamber 12. Wherein the cooling chamber 11 and the profile chamber 12 are independent of each other and are not communicated with each other. The cooling chamber 11 includes a first sub-chamber 111 and a second sub-chamber 112 extending along a length direction of the liquid cooling body 1 in opposite concept and communicating with each other, the first sub-chamber 111 and the second sub-chamber 112 are configured to accommodate a cooling liquid, and the cooling liquid in the first sub-chamber 111 can flow into the second sub-chamber 112. The first subchamber 111 and the second subchamber 112 are respectively fixedly provided with the inner fins 2, and the arrangement of the inner fins 2 can increase the structural strength of the liquid cooling body 1 on one hand and can increase the heat exchange efficiency or the heat exchange power of the liquid cooling body 1 on the other hand.

As shown in fig. 1 and 2, the top surface of the liquid cooling body 1 (i.e., the surface of the top plate of the liquid cooling body 1) has a liquid inlet (not shown) that communicates with the first subchamber 111 and a liquid outlet 13 that communicates with the second subchamber 112, and the cooling liquid can flow into the first subchamber 111 through the liquid inlet, flow into the second subchamber 112 from the first subchamber 111, and flow out from the liquid outlet 13. It can be seen that the first subchamber 111 and the second subchamber 112 in this embodiment are liquid cooling channels. The liquid cooling body 1 in this embodiment is a part of a battery case of a battery pack, that is, the liquid cooling body 1 is used to form the battery case. Specifically, the liquid cooling body 1 is used for forming the bottom of the battery box, and more specifically, the liquid cooling body 1 is a profile.

The monomer liquid cooling module that this embodiment provided for the integrated design of liquid cooling runner of cooling battery module is in liquid cooling body 1, and liquid cooling body 1 is double-deck cavity structure, sets up the cavity of upper strata into cooling chamber 11, and the cavity of lower floor sets up to section bar cavity 12, and cooling chamber 11 can form the liquid cooling runner for the coolant liquid can flow in liquid cooling body 1, through the structure that will be used for forming the structure multiplexing of battery box for forming the liquid cooling runner, need not to set up independent liquid cooling board in the battery box additionally, also need not to set up structures such as bubble cotton, and then makes the cost of monomer liquid cooling module lower, thereby reduced the cooling cost of battery package.

In addition, a plurality of liquid cooling plates are usually arranged in a battery box in the prior art, the liquid cooling plates are connected in series/parallel through water pipes, the connecting structure is complex, the liquid cooling plates occupy at least 6 millimeters of inner space in the Z-direction (namely the thickness direction of the battery pack) of the battery pack, the mass of the independent liquid cooling plates is heavier, and the mass of the independent liquid cooling plates can reach 15-20 kilograms generally, so that challenges are brought to cost, energy density and volume grouping rate. The monomer liquid cooling module that this embodiment provided for constitute the structure of liquid cooling runner and the peripheral structure sharing of battery box, reduced the weight of monomer liquid cooling module and the space that needs occupy, and then reduced the weight of battery package, do benefit to the lightweight of battery package.

Alternatively, as shown in fig. 3 and 4, the cooling chamber 11 and the profile chamber 12 are partitioned by a partition plate 3 provided in the liquid-cooled body 1. That is, the partition plate 3 is fixedly connected to both side walls in the width direction of the liquid cooling body 1. In addition, as shown in fig. 6 and 7, the inner fins 2 have a rectangular corrugated structure, and liquid cooling channels are respectively formed between the inner fins 2 and the partition plate 3 and between the inner fins 2 and the top plate of the liquid cooling body 1, so that the cooling liquid can be uniformly split into a plurality of liquid cooling channels, and the uniformity of cooling the battery module is improved. It should be noted that, in the present embodiment, the liquid cooling flow channel extends along the length direction of the liquid cooling body 1, and in some embodiments, the inner fins 2 are fixedly connected with the top plate and the partition plate 3, respectively, so as to improve the stability of the inner fins 2.

Further, the inner fins 2 are respectively disposed at intervals with the end plates at two ends of the liquid cooling body 1 in the length direction, that is, the inner fins 2 are disposed at intervals with the end plate at one end of the liquid cooling body 1, and the inner fins 2 are disposed at intervals with the end plate at the other end of the liquid cooling body 1, that is, the inner fins 2 are disposed only in the middle areas of the first subchamber 111 and the second subchamber 112, so that the cooling liquid fully flows into one end of the first subchamber 111 and is split into a plurality of liquid cooling flow channels formed by the inner fins 2, the top plate and the partition plate 3.

In this embodiment, as shown in fig. 4, the first subchamber 111 is divided by a plurality of third partition plates 8 to form a plurality of first flow passages 1111, and the plurality of first flow passages 1111 are sequentially arranged along the second direction, and each of the first flow passages 1111 is provided with an inner fin 2 therein. The second subchamber 112 is partitioned by the fourth partitions 9 to form a plurality of second flow passages 1121, and the plurality of second flow passages 1121 are sequentially arranged in the second direction. An inner fin 2 is provided in each of the second flow passages 1121.

Alternatively, the liquid-cooled body 1 has a first end and a second end disposed opposite to each other along its length. As shown in fig. 4, the first subchamber 111 is partitioned from the second subchamber 112 by a first partition plate 4 provided in the cooling chamber 11. Specifically, the first partition plate 4 extends along the length direction of the liquid cooling body 1, and one end of the first partition plate 4 is in sealing connection with the end plate of the first end of the liquid cooling body 1, and the other end of the first partition plate 4 is spaced from the end plate of the second end of the liquid cooling body 1, so as to form a liquid cooling flow channel which communicates the first subchamber 111 and the second subchamber 112, that is, the other end of the first partition plate 4 and the end plate of the second end of the liquid cooling body 1 form a liquid cooling flow channel through which cooling liquid flows. The liquid inlet and the liquid outlet 13 are both arranged at the first end of the liquid cooling body 1.

In some embodiments, the distance between the liquid inlet and the first end of the liquid cooling body 1 is greater than the distance between the liquid outlet 13 and the first end of the liquid cooling body 1, that is, the liquid inlet and the liquid outlet 13 are arranged in a staggered manner, so that the liquid cooling pipe connected with the liquid inlet and the liquid cooling pipe connected with the liquid outlet 13 interfere with each other when the liquid cooling pipe is connected, and the installation is affected. In other embodiments, the distance between the liquid outlet 13 and the first end of the liquid cooling body 1 is greater than the distance between the liquid inlet and the first end of the liquid cooling body, which is not limited in this embodiment.

In this embodiment, the monomer liquid cooling module further includes a liquid inlet connector 5 and a liquid outlet connector 6 respectively fixedly connected to the liquid cooling body 1. Wherein, the liquid inlet joint 5 is communicated with the liquid inlet, and the liquid outlet joint 6 is communicated with the liquid outlet 13. The liquid inlet joint 5 and the liquid outlet joint 6 are communicated with an external cooling source.

Optionally, as shown in fig. 3 and 4, a plurality of second partitions 7 perpendicular to the bottom plate of the liquid cooling body 1 are provided in the profile chamber 12. The plurality of second partition plates 7 are arranged in parallel along the length direction of the liquid cooling body 1, and the plurality of second partition plates 7 divide the profile cavity 12 to form a plurality of third subchambers 121. The arrangement of the second partition plate 7 can improve the structural strength of the liquid cooling body 1, and the arrangement of the profile cavity 12 can prevent the cooling liquid from absorbing heat of the bottom plate of the liquid cooling body 1.

In the present embodiment, the liquid-cooled body 1, the first partition plate 4, the second partition plate 7, the third partition plate 8, and the fourth partition plate 9 are integrally formed, and may be formed by injection molding or the like.

Example two

The present embodiment provides a battery case, as shown in fig. 8, the battery case includes a case bottom 10 and case side parts 20 disposed around the case bottom 10, in some embodiments, the battery case is square, the case side parts 20 are provided with four, and the four case side parts 20 are welded to the case bottom 10, respectively. The tank bottom 10 includes at least one single liquid cooling module as in embodiment one, that is, the single liquid cooling module forms the tank bottom 10 of the battery tank, that is, the tank bottom 10 of the battery tank has a cooling function, and no liquid cooling plate is required to be arranged at the tank bottom 10. It should be noted that, the tank bottom 10 includes only at least one monomer liquid cooling module as in the first embodiment, and does not include other structures such as a plate.

Further, referring to fig. 8, a plurality of single liquid cooling modules are provided, that is, a plurality of liquid cooling bodies 1 are provided, the plurality of liquid cooling bodies 1 are sequentially arranged along the length direction or the width direction of the battery box, and two adjacent liquid cooling bodies 1 are welded to form an integral box bottom 10. The plurality of liquid cooling bodies 1 are welded to the case side portion 20, so that the fixing effect of the liquid cooling bodies 1 in the case can be further improved.

Still further, along the direction of arrangement of the plurality of liquid cooling bodies 1, a plurality of liquid inlets and a plurality of liquid outlets 13 of the plurality of monomer liquid cooling modules are staggered in turn, so as to ensure the connectivity of the internal pipelines of the battery box.

Example III

The present embodiment provides a battery pack, as shown in fig. 9 and 10, which includes a battery case and a plurality of battery modules 100 in the second embodiment. The plurality of battery modules 100 are arranged in an array, and each battery module 100 is adhered to the liquid cooling body 1 of the bottom 10 of the box body through heat-conducting glue, and specifically adhered to the top plate of the liquid cooling body 1. The liquid inlet connector 5 and the liquid outlet connector 6 are arranged to avoid the battery module 100.

The battery pack provided by the embodiment does not need to additionally increase liquid cooling system components such as a liquid cooling plate and foam, can take away the heat of the battery module 100, ensures that the battery module 100 in the battery pack is at safe working temperature, ensures safety, and has lower cost.

The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. Monomer liquid cooling module, its characterized in that, including being cuboid form and hollow liquid cooling body (1), liquid cooling body (1) have cooling cavity (11) and section bar cavity (12) of arranging along thickness direction, cooling cavity (11) are including following liquid cooling body (1) length direction extends first sub-chamber (111) and second sub-chamber (112) that set up and communicate each other, first sub-chamber (111) with interior fin (2) have been set firmly respectively in second sub-chamber (112), just the top surface of liquid cooling body (1) has intercommunication inlet and intercommunication of first sub-chamber (111) liquid outlet (13) of second sub-chamber (112).

2. The monomer liquid cooling module according to claim 1, wherein the cooling chamber (11) and the profile chamber (12) are formed by separating a partition plate (3) arranged in the liquid cooling body (1), the inner fin (2) is of a rectangular wave structure, liquid cooling flow passages are respectively formed between the inner fin (2) and the partition plate (3) and between the inner fin (2) and a top plate of the liquid cooling body (1), and the liquid cooling flow passages extend along the length direction of the liquid cooling body (1).

3. The monomer liquid cooling module according to claim 2, wherein the inner fins (2) are provided at intervals from end plates at both ends in the longitudinal direction of the liquid cooling body (1), respectively.

4. A monomer liquid cooling module according to any one of claims 1-3, wherein the first subchamber (111) and the second subchamber (112) are formed by separating a first partition plate (4) arranged in the cooling chamber (11), the first partition plate (4) extends along the length direction of the liquid cooling body (1), one end of the first partition plate (4) is in sealing connection with an end plate of the first end of the liquid cooling body (1), the other end of the first partition plate (4) is arranged at intervals with an end plate of the second end of the liquid cooling body (1) to form a liquid cooling flow channel which is communicated with the first subchamber (111) and the second subchamber (112), and the liquid inlet and the liquid outlet (13) are both arranged at the first end of the liquid cooling body (1).

5. The monomer liquid cooling module according to claim 4, wherein the distance from the liquid inlet to the first end is greater than the distance from the liquid outlet (13) to the first end; or, the distance between the liquid outlet (13) and the first end is larger than the distance between the liquid inlet and the first end.

6. A monomer liquid cooling module according to any one of claims 1-3, further comprising a liquid inlet joint (5) and a liquid outlet joint (6) fixedly connected to the liquid cooling body (1), respectively, wherein the liquid inlet joint (5) is communicated with the liquid inlet, and the liquid outlet joint (6) is communicated with the liquid outlet (13).

7. A monomer liquid cooling module according to any one of claims 1-3, wherein a plurality of second partition boards (7) perpendicular to the bottom board of the liquid cooling body (1) are arranged in the section cavity (12), the plurality of second partition boards (7) are arranged in parallel along the length direction of the liquid cooling body (1), and the section cavity (12) is partitioned by the plurality of second partition boards (7) to form a plurality of third subchambers (121).

8. Battery compartment, characterized by comprising a compartment bottom (10) and a compartment side (20) arranged around the compartment bottom (10), the compartment bottom (10) comprising at least one monomer liquid cooling module according to any one of claims 1-6.

9. The battery box according to claim 8, wherein a plurality of single liquid cooling modules are provided, a plurality of liquid cooling bodies (1) are sequentially arranged, two adjacent liquid cooling bodies (1) are welded, and a plurality of liquid cooling bodies (1) are welded with the side part (20) of the box.

10. Battery pack, characterized by comprising a battery case and a plurality of battery modules (100) according to claim 8 or 9, wherein the battery modules (100) are adhered to the liquid-cooled body (1) of the case bottom (10) by heat-conductive adhesive.