CN219873691U - Liquid cooling subassembly and battery package - Google Patents

Abstract

The utility model discloses a liquid cooling assembly and a battery pack, wherein the battery pack comprises a battery box, a battery module and the liquid cooling assembly, the liquid cooling assembly is arranged in the battery box, and the battery module is connected to the liquid cooling assembly in a matching way and is arranged in the battery box so as to cool the battery module; the liquid cooling assembly comprises a cooling part and a matching part, wherein the cooling part is provided with a cooling cavity for fluid to flow; the cooperation portion sets up in the opposite side of cooling portion, is equipped with module mounting structure on the cooperation portion, and module mounting structure is used for the both ends of battery module to be connected with the cooperation of liquid cooling subassembly. In the scheme, the heat dissipation performance of the battery pack can be improved through the arrangement of the liquid cooling assembly, so that the normal use of the battery pack is guaranteed, and the service life of the battery pack is prolonged; and the cooperation portion is provided with the cooperation of convenient liquid cooling subassembly and other structures of battery package such as battery module and battery case and is connected, promotes assembly efficiency.

Description

Liquid cooling subassembly and battery package

Technical Field

The utility model belongs to the technical field of battery packs, and particularly relates to a liquid cooling assembly and a battery pack.

Background

At present, battery packs on mainstream electric vehicles all need to be cooled to meet driving requirements of the electric vehicles at different use temperatures, and battery cooling modes generally have different forms such as liquid cooling, air cooling, natural cooling and the like; the cooling system of the battery needs to consider factors such as air tightness, weight, strength, space arrangement, assembly requirements, positioning and the like in the battery pack.

At present, in electric automobiles on the market, a liquid cooling device adopted by a battery pack is a liquid cooling plate. In the main assembly methods, the liquid cooling plate is supported by the liquid cooling support plate, the liquid cooling plate and the liquid cooling support plate are required to be connected, positioned and fixed in an equipotential manner, and the liquid cooling support plate is also required to be connected, positioned and fixed in an equipotential manner.

It follows that there are numerous drawbacks of the prior art that further improvements and enhancements are needed.

Disclosure of Invention

The utility model provides a liquid cooling assembly and a battery pack, which aim to solve at least one technical problem of the technical problems.

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

in a first aspect, the present utility model provides a liquid cooling assembly configured to be disposed in a battery box to cool a battery module, the liquid cooling assembly including a cooling portion and a mating portion, the cooling portion having a cooling cavity through which a fluid flows; the cooperation portion set up in the opposite side of cooling portion, be equipped with module mounting structure on the cooperation portion, module mounting structure is used for the both ends of battery module with the cooperation of liquid cooling subassembly is connected.

In the scheme, the liquid cooling assembly can improve the heat radiation performance of the battery pack, so that the normal use of the battery pack is guaranteed, and the service life of the battery pack is prolonged; the cooperation portion is provided with the cooperation of making things convenient for liquid cooling subassembly and other structures of battery package such as battery module and battery case to be connected, promotes assembly efficiency.

As a preferred embodiment of the present utility model, the module mounting structure includes coupling holes provided at the coupling parts at both sides of the cooling part, respectively, such that the battery module is coupled to the liquid cooling assembly by a coupling member passing through the end of the battery module and the coupling holes.

By adopting the structure, the stability of the connecting structure between the battery module and the liquid cooling assembly can be further improved, the liquid cooling assembly and the battery module can be conveniently and integrally installed in the battery box, and the assembly efficiency is improved.

As a preferred embodiment of the present utility model, a mating cavity communicating with the mating hole is further provided in the mating portion, and the mating cavity is used for accommodating a fastener mated with the connecting piece.

Adopt above-mentioned structure to make connection structure between connecting piece, fastener and battery module and the liquid cooling subassembly compacter, and can be based on the liquid cooling subassembly with connecting piece, fastener and battery module and liquid cooling subassembly integration as a whole, conveniently pack into the battery box with liquid cooling subassembly and battery module is whole, promotes assembly efficiency.

As a preferred embodiment of the present utility model, the fitting chamber penetrates the fitting portion in an extending direction of the fitting portion.

By adopting the structure, the stability of the connecting structure between the battery module and the liquid cooling assembly can be further improved, the liquid cooling assembly and the battery module can be conveniently and integrally installed in the battery box, and the assembly efficiency is improved.

As a preferred embodiment of the present utility model, the mating part has a protrusion protruding toward the battery module; the matching hole is formed in the protruding portion.

By adopting the structure, the installation space can be reserved for the arrangement of the battery module between the protruding part and the cooling part, so that the positioning installation of the liquid cooling assembly and the battery module can be facilitated, the relative movement between the liquid cooling assembly and the battery module in the horizontal direction can be limited, and the stability of the connection structure between the battery module and the liquid cooling assembly is improved.

In a preferred embodiment of the present utility model, the liquid cooling assembly further includes an extension portion provided on a side of the engaging portion away from the cooling portion, the extension portion extending outward of the cooling portion for engaging with the battery box.

The extension part is convenient for limiting and matching of the liquid cooling assembly in the battery box along the horizontal direction, so that the liquid cooling assembly is prevented from shifting in the horizontal direction, and the assembly efficiency and the assembly accuracy are improved; the cooling device is beneficial to ensuring that the liquid cooling component can normally and stably play a cooling role in the long-term use process.

As a preferred embodiment of the present utility model, the engaging part has a protrusion protruding toward the battery module, the extension part is provided at one end of the protrusion near the battery module, and the extension part is used for press-contacting with a boss provided in the battery case.

By adopting the structure, on one hand, the positioning and the installation of the liquid cooling assembly in the battery box can be facilitated, the horizontal displacement of the liquid cooling assembly in the battery box can be limited, and the stability of the connecting structure between the liquid cooling assembly and the battery box is improved.

As a preferred embodiment of the present utility model, the cooling chamber has a plurality of flow channel walls extending in the fluid flow direction, and cooling flow channels are defined adjacent to the flow channel walls and between the flow channel walls and the inner wall of the cooling chamber; the cooling flow channels are not communicated with each other or at least a part of the cooling flow channels are communicated with each other.

The cooling flow channel is convenient to set up, the flow of each part of cooling liquid in the cooling cavity is reasonably distributed, and the heat exchange and heat dissipation efficiency is improved.

As a preferred embodiment of the utility model, the flow channel walls are arranged in a straight and/or curved line.

The linear arrangement is beneficial to improving the flow velocity of the cooling liquid and improving the heat exchange efficiency; the curve setting is favorable to the flow of each partial cooling liquid in the rational distribution cooling chamber, and can increase a part of heat transfer area, is favorable to heat transfer, heat dissipation.

As a preferred embodiment of the present utility model, a flow guiding area is further disposed inside the cooling cavity, and the flow guiding area is disposed at an inlet end and/or an outlet end of the cooling flow channel and is in communication with the cooling flow channel, and is used for distributing fluid to a plurality of cooling flow channels.

The flow guiding area is convenient to reasonably distribute the flow of the cooling fluid of each cooling flow channel, and the heat exchange and heat dissipation efficiency is improved.

In a second aspect, the utility model further provides a battery pack, which comprises a battery box, a battery module and the liquid cooling assembly, wherein the liquid cooling assembly is arranged in the battery box, and the battery module is connected to the liquid cooling assembly in a matching manner.

The liquid cooling assembly can improve the heat radiation performance of the battery pack, thereby being beneficial to ensuring the normal use of the battery pack and prolonging the service life of the battery pack; the cooperation portion is provided with the cooperation of making things convenient for liquid cooling subassembly and other structures of battery package such as battery module and battery case to be connected, promotes assembly efficiency.

As a preferred embodiment of the present utility model, the liquid cooling assembly is disposed at the bottom inside the battery box; at least two opposite bottom edges in the battery box are provided with bosses protruding into the battery box, and matching parts on two sides of the cooling part are arranged on the inner sides of the bosses in the battery box.

Adopt above-mentioned structure can make things convenient for the location installation of liquid cooling subassembly in the battery box, and can restrict the horizontal displacement of liquid cooling subassembly in the battery box, promote connection structure's stability between liquid cooling subassembly and the battery box.

As a preferred embodiment of the present utility model, the engagement portion and the boss are interference fit or clearance fit.

In the scheme, when the fit part is in interference fit with the boss, the liquid cooling assembly can be clamped and fixed in the horizontal direction through the boss, so that the stability of a connecting structure between the battery box and the liquid cooling assembly is improved; when the matching part is matched with the boss by adopting a clearance, enough thermal deformation space can be provided for the liquid cooling assembly, and the structural damage caused by excessive deformation and extrusion of the battery box and the liquid cooling assembly due to temperature difference is avoided; and the gap between the matching part and the boss is conveniently filled with structural adhesive and the like to improve the heat transfer efficiency between the liquid cooling assembly and the battery box, and the heat dissipation effect is improved.

As a preferred embodiment of the present utility model, the battery module includes a plurality of battery cells and end plates provided at both ends of the plurality of battery cells, the end plates being provided with end plate mounting structures corresponding to the module mounting structures; the battery module is connected to the liquid cooling assembly in a matched manner through a connecting piece penetrating through the end plate mounting structure and the module mounting structure; and a plurality of battery cells are attached to the cooling part.

By adopting the structure, the stability of the connecting structure between the battery module and the liquid cooling assembly can be further improved, the liquid cooling assembly and the battery module can be conveniently and integrally installed in the battery box, and the assembly efficiency is improved. The assembly connection of the liquid cooling assembly and the battery module is facilitated, the heat exchange area of the liquid cooling assembly and the battery module is enlarged, the liquid cooling assembly and the battery module are integrated into a whole, the connection structure of the liquid cooling assembly and the battery module is compact, and the heat dissipation efficiency is improved; and the liquid cooling assembly and the battery module are conveniently and integrally arranged in the battery box, so that the assembly efficiency is improved.

As a preferred embodiment of the present utility model, the battery module is adhesively connected to the cooling part;

and/or the liquid cooling assembly is connected with the battery box in an adhesive manner;

and/or the gap in the battery box is filled with heat-conducting glue.

In the scheme, the bonding structure is simple, the assembly of the liquid cooling assembly, the battery module and the battery box is convenient, the connection strength is improved, and the production cost is low; the bonding may be by using a heat-conductive adhesive or a structural adhesive (e.g., structural adhesive bonding is used between the liquid-cooled assembly and the battery case, and heat-conductive adhesive bonding is used between the battery module and the liquid-cooled assembly), as the case may be. In practice, structural adhesive with good heat conduction performance can be used as a heat conduction medium between the battery module, the battery box and the liquid cooling assembly, and compared with air used as the heat conduction medium, the heat exchange efficiency among the battery module, the battery box and the liquid cooling assembly is improved.

In addition, in the scheme, when the gap in the battery box is filled with the heat-conducting glue, the stability of the connection structure among the battery box, the liquid cooling assembly and the battery module is greatly improved, and the shock absorption performance of the whole battery pack is improved, so that the service life of the battery pack is prolonged.

By adopting the technical scheme, the utility model has the following beneficial effects:

the heat dispersion of the battery pack can be improved by arranging the liquid cooling component in the battery box, so that the normal use of the battery pack is guaranteed, and the service life of the battery pack is prolonged. And inside the battery box, the cooperation framework between liquid cooling subassembly, battery box and the battery module is simple practical and compact structure, and wherein boss and cooperation portion's cooperation has made things convenient for the location installation of liquid cooling subassembly in the battery box, and can restrict the horizontal displacement of liquid cooling subassembly in the battery box, promotes connection structure's stability between liquid cooling subassembly and the battery box, has made things convenient for the cooperation of liquid cooling subassembly and battery module and battery box to be connected, promotes assembly efficiency.

In addition, the battery box, the battery module and the cooling part can be connected in an adhesive manner through filling glue materials, the adhesive structure is simple, the assembly of the liquid cooling assembly, the battery module and the battery box is convenient, the replacement of the liquid cooling assembly and/or the battery module is convenient, and the production cost is low; and the structural adhesive with good heat conduction performance can be selected as a heat conduction medium between the battery module, the battery box and the liquid cooling assembly, so that the heat exchange efficiency among the battery module, the battery box and the liquid cooling assembly is improved compared with the air serving as the heat conduction medium.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a schematic structure of a battery pack;

FIG. 2 is a schematic view of a partial cross-sectional structure of a battery pack;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic diagram of a liquid cooling assembly;

FIG. 5 is a schematic view of a vertical cross-sectional configuration of a liquid cooling assembly;

FIG. 6 is a schematic diagram of a horizontal cross-sectional configuration of a liquid cooling assembly;

fig. 7 is a schematic diagram of a matching structure of a battery module and a liquid cooling assembly;

fig. 8 is an enlarged view of a portion B in fig. 7.

Wherein, the liquid crystal display device comprises a liquid crystal display device,

1 a liquid cooling assembly, 11 a cooling part, 111 a runner wall, 112 a cooling runner, 113 a diversion area, 12 a matching part, 121 a matching cavity, 122 a protruding part, 123 a matching hole, 124 an extension part;

2, a battery box and 21 bosses;

31 cells, 32 end plates;

41 connectors, 42 fasteners.

Detailed Description

In order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than those described herein, and therefore the scope of the present utility model is not limited to the specific embodiments disclosed below.

In addition, in the description of the present utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; 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 can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 utility model. In this specification, schematic representations of the above terms are not necessarily directed 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.

As shown in fig. 1-8, the present utility model provides a liquid cooling assembly 1 and a battery pack, the battery pack includes a battery box 2, a battery module disposed in the battery box 2, and the liquid cooling assembly 1, where the liquid cooling assembly 1 is used for cooling and dissipating heat of the battery module. Referring to fig. 4, the liquid cooling module 1 includes a cooling portion 11 and a fitting portion 12, the cooling portion 11 having a cooling chamber through which a fluid flows; the cooperation portion 12 sets up in the opposite side of cooling portion 11, is equipped with the module mounting structure on the cooperation portion 12, and the module mounting structure is used for the both ends of battery module to be connected with the cooperation of liquid cooling subassembly 1.

In the scheme, the liquid cooling assembly 1 is arranged in the battery box 2, so that the heat dissipation performance of the battery pack can be improved, the normal use of the battery pack can be guaranteed, and the service life of the battery pack can be prolonged. And the cooperation portion 12 is provided with the cooperation of convenient liquid cooling subassembly 1 and other structures of battery package such as battery module and battery case 2 and is connected, promotes assembly efficiency.

Specifically, as shown in fig. 2, 7 and 8, the liquid cooling assembly 1 is disposed at the bottom of the battery box 2, and the battery module is cooperatively connected above the liquid cooling assembly 1. At least two opposite bottom edges in the battery box 2 are provided with bosses 21 protruding into the battery box 2, and the matching parts 12 on both sides of the cooling part 11 are arranged inside the bosses 21 in the battery box 2. The boss 21 and the cooperation of cooperation portion 12 have made things convenient for the location installation of liquid cooling subassembly 1 in battery box 2, and can restrict the horizontal displacement of liquid cooling subassembly 1 in battery box 2, promote the stability of connection structure between liquid cooling subassembly 1 and the battery box 2.

As a preferred embodiment of the present utility model, the engagement portion 12 and the boss 21 are interference fit or clearance fit. In the scheme, when interference fit is adopted between the fit part 12 and the boss 21, the liquid cooling assembly 1 can be clamped and fixed in the horizontal direction through the boss 21, so that the stability of a connecting structure between the battery box 2 and the liquid cooling assembly 1 is improved; when the matching part 12 is matched with the boss 21 by adopting a clearance, enough thermal deformation space can be provided for the liquid cooling assembly 1, and the structural damage caused by excessive deformation and extrusion of the battery box 2 and the liquid cooling assembly 1 due to temperature difference is avoided; and the gap between the matching part 12 and the boss 21 is conveniently filled with heat-conducting glue or structural glue to improve the heat transfer efficiency between the liquid cooling assembly 1 and the battery box 2 and improve the heat dissipation effect. In a specific example, referring to fig. 3, a clearance fit is used between the fitting portion 12 and the boss 21. The above examples are only one preferred example of the present utility model, and the present utility model is not limited thereto.

In a preferred embodiment of the present utility model, the battery case 2, the battery module, and the cooling unit 11 of the present utility model may be bonded together by a filler material. In the scheme, the bonding structure is simple, the assembly of the liquid cooling assembly, the battery module and the battery box is convenient, the connection strength is improved, and the production cost is low; the bonding may use a heat-conductive adhesive or a structural adhesive (for example, structural adhesive bonding is adopted between the liquid cooling assembly 1 and the battery box 2, and heat-conductive adhesive bonding is adopted between the battery module and the liquid cooling assembly 1) according to circumstances. In practice, structural adhesive with good heat conduction performance can be used as a heat conduction medium between the battery module, the battery box 2 and the liquid cooling component 1, and compared with air used as the heat conduction medium, the heat exchange efficiency among the battery module, the battery box and the liquid cooling component is improved.

The type and filling manner of the sizing material are not particularly limited, and any of the following embodiments may be adopted in the present utility model:

embodiment one: and heat-conducting glue is filled between the battery module and the liquid cooling assembly 1. Can realize the bonding between battery module and the liquid cooling subassembly 1 also can promote the heat conduction efficiency between battery module and the liquid cooling subassembly 1 to promote the cooling effect of liquid cooling subassembly 1 to battery module.

Embodiment two: and filling structural adhesive between the liquid cooling assembly 1 and the battery box 2 to fix the liquid cooling assembly 1 at the bottom of the battery box 2 in an adhering way. The structural adhesive has good adhesive property and sufficient adhesive strength, can ensure the stability of a connecting structure between the liquid cooling assembly 1 and the battery box 2, has simple adhesive structure, is easy and convenient to operate and low in cost, is favorable for improving assembly efficiency and reduces production cost.

Embodiment III: and heat-conducting glue is filled in gaps between the battery box 2 and the liquid cooling assembly 1 and between the battery box 2 and the battery module inside the battery box 2. Under the third embodiment, the stability of the connection structure among the battery box 2, the liquid cooling assembly 1 and the battery module is greatly improved, and the cushioning performance of the whole battery pack is also greatly improved due to the fact that the gaps are filled with the heat conducting glue, so that the damage to the battery pack caused by various collisions and shaking in the daily use process can be reduced, and the service life of the battery pack is prolonged; and the structural adhesive with good heat-conducting property can be selected to be filled in the gaps, so that the heat exchange efficiency among the battery box 2, the battery module and the liquid cooling assembly 1 is improved compared with the air serving as a heat-conducting medium, the heat dissipation efficiency of the whole battery pack is improved, and the service life of the battery pack is further prolonged.

It should be noted that the above embodiments are only some preferred embodiments of the present utility model, and any combination of the above three embodiments may be adopted in the actual battery pack assembly process. The connection method and connection structure of the battery case 2, the liquid cooling module 1 and the battery module in the present utility model are not limited to the above embodiments and combinations thereof.

Further, referring to fig. 3, 4, 5, 7 and 8, the module mounting structure includes a mating hole 123 correspondingly disposed on the mating portion 12 at two sides of the cooling portion 11, a mating cavity 121 communicating with the mating hole 123 is further disposed in the mating portion 12, and the mating cavity 121 is used for accommodating the fastener 42 mated with the connecting member 41 _， So that the battery module is coupled to the liquid cooling assembly 1 by the coupling members 41 passing through the end portions of the battery module and the coupling holes 123. And the fitting cavity 121 penetrates the fitting portion 12 in the extending direction of the fitting portion 12. Adopt above-mentioned structure to make connection structure between connecting piece 41, fastener 42 and battery module and the liquid cooling subassembly 1 compacter, and can be based on liquid cooling subassembly 1 with connecting piece 41, fastener 42 and battery module and liquid cooling subassembly 1 integration as a whole, conveniently pack into battery box 2 with liquid cooling subassembly 1 and battery module is whole, promotes assembly efficiency.

Here, the manner in which the fitting hole 123 is provided is not limited in the present utility model. As a specific example of the present example, referring to fig. 3 and 5, the mating part 12 has a protrusion 122 protruding toward the battery module; the mating hole 123 is formed on the protruding portion 122. And the coupling holes 123 provided at the protrusions 122 at both sides are symmetrically provided, thereby facilitating the coupling of the coupling holes 123 with the connection structure of the end of the battery module. In addition, the installation space can be reserved for the setting of battery module between bulge 122 and the cooling portion 11 to can make things convenient for the location installation of liquid cooling subassembly 1 and battery module, also can restrict the relative motion between liquid cooling subassembly 1 and the battery module in the horizontal direction, promote the connection structure's between battery module and the liquid cooling subassembly 1 stability.

Further, referring to fig. 3 and 5, the liquid cooling module 1 further includes an extension portion 124 provided on a side of the engaging portion 12 away from the cooling portion 11, and the extension portion 124 extends outward of the cooling portion 11 for engaging and connecting with the battery case 2. Specifically, the extension 124 is disposed on the protruding portion 122 near one end of the battery module, and the extension 124 is used for being pressed against the boss 21 disposed in the battery case 2. The arrangement of the extension part 124 and the matching of the extension part 124 and the boss 21 facilitate the positioning and the installation of the liquid cooling assembly 1 in the battery box 2, and can limit the horizontal displacement of the liquid cooling assembly 1 in the battery box 2, avoid the displacement of the liquid cooling assembly 1 in the horizontal direction and improve the assembly efficiency and the assembly accuracy; the liquid cooling assembly 1 is beneficial to ensuring the normal and stable cooling effect in the long-term use process.

The following describes in further detail the structure of the battery module, the battery case 2, and the liquid cooling assembly 1 according to a specific embodiment:

in this embodiment, referring to fig. 2 and 3, the cooling part 11 and the protruding part 122 are erected between the bosses 21 on both sides of the bottom of the battery case 2, and the structural adhesive is filled between the bottom of the protruding part 122 and the cooling part 11 and the bottom of the battery case 2, and the extending part 124 is pressed against the bosses 21. Referring to fig. 7 and 8, the battery module includes a plurality of battery cells 31 and end plates 32 provided at both ends of the battery cells 31, the battery cells 31 are attached to the cooling portion 11, and heat conductive adhesive is filled between the battery cells 31 and the cooling portion 11. The end plate 32 is provided with an end plate 32 mounting structure corresponding to the module mounting structure, the end plate 32 mounting structure comprises a connecting hole (not shown in the figure) corresponding to the matching hole 123, and the connecting piece 41 can pass through the connecting hole and the matching hole 123 and extend into the matching cavity 121 to be locked and matched with the fastener 42, so that the battery module is matched and connected to the liquid cooling assembly 1.

The specific structures of the connection holes, the fitting holes 123, the connection members 41, the fastening members 42, and the connection manner thereof are not particularly limited in this embodiment. Referring to fig. 7 and 8, the connecting member 41 may be a connecting rod, and the fastening member 42 may be a nut capable of being engaged with the connecting rod, and the connecting rod passes through the connecting hole and the engaging hole 123 and extends into the engaging cavity 121 to be locked with the nut. The connecting structure is simple and reliable and has high assembly efficiency. Of course, the connecting hole and the matching hole 123 can be provided with internal threads, the connecting rod can also be provided with external threads matched with the internal threads, the connecting rod can be locked and fixed with the connecting hole and the matching hole 123 through matching of the internal threads and the external threads, and at the moment, the mounting step of the fastener 42 can be omitted, so that the mounting efficiency is further improved. Of course, the specific structures of the connecting hole, the mating hole 123, the connecting member 41, the fastening member 42 and the connection manner thereof are not limited to the above examples, and other different connecting structures and connection manners may be adopted.

Further, referring to fig. 5 and 6, the cooling chamber has a plurality of flow channel walls 111 extending in the fluid flow direction, and cooling flow channels 112 are defined between adjacent flow channel walls 111 and between the flow channel walls 111 and the inner wall of the cooling chamber; the cooling flow channels 112 are not in communication with each other or at least a portion of the cooling flow channels 112 are in communication with each other. The cooling flow passage 112 is convenient to set up, and the flow of each part of cooling liquid in the cooling cavity is reasonably distributed, so that the heat exchange and heat dissipation efficiency is improved. The flow channel wall 111 may extend in a straight line and/or a curved line. When the flow channel walls 111 are arranged along a straight line, the obstruction of the flow channel walls 111 to the cooling liquid is reduced, and the flow velocity of the cooling liquid is improved, so that the heat exchange efficiency is improved; when the flow channel wall 111 is arranged along the curve, the flow of each part of cooling liquid in the cooling cavity is reasonably distributed, and a part of heat exchange area can be increased, so that heat exchange and heat dissipation are facilitated.

With continued reference to fig. 6, a flow guiding region 113 is further disposed in the cooling cavity, where the flow guiding region 113 is disposed at an inlet end and/or an outlet end of the cooling flow channel 112 and is in communication with the cooling flow channel 112, and the flow guiding region 113 is configured to distribute fluid to the plurality of cooling flow channels 112. The flow guiding area 113 is convenient to set up, and the flow of the cooling liquid of each cooling flow channel 112 is reasonably distributed, so that the heat exchange and heat dissipation efficiency is improved.

The utility model can be realized by adopting or referring to the prior art at the places which are not described in the utility model.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.

Claims (15)

1. The liquid cooling assembly is arranged in the battery box to cool the battery module, and is characterized by comprising a cooling part and a matching part, wherein the cooling part is provided with a cooling cavity for fluid to flow; the cooperation portion set up in the opposite side of cooling portion, be equipped with module mounting structure on the cooperation portion, module mounting structure is used for the both ends of battery module with the cooperation of liquid cooling subassembly is connected.

2. The liquid cooling assembly according to claim 1, wherein the module mounting structure includes mating holes provided on the mating parts on both sides of the cooling part, respectively, such that the battery module is connected to the liquid cooling assembly by connecting members passing through the ends of the battery module and the mating holes.

3. The liquid cooling assembly of claim 2, wherein the mating portion further includes a mating cavity in communication with the mating aperture, the mating cavity for receiving a fastener mated with the connector.

4. The liquid cooling assembly of claim 3, wherein the mating cavity extends through the mating portion in the direction of extension of the mating portion.

5. The liquid cooling assembly according to claim 2, wherein the fitting portion has a protruding portion protruding toward the battery module; the matching hole is formed in the protruding portion.

6. The liquid cooling assembly of any one of claims 1-5, further comprising an extension portion disposed on a side of the mating portion remote from the cooling portion, the extension portion extending outward of the cooling portion for mating connection with the battery box.

7. The liquid cooling assembly according to claim 6, wherein the fitting portion has a protruding portion protruding toward the battery module, the extending portion is provided on one end of the protruding portion near the battery module, and the extending portion is for press-contact with a boss provided in the battery case.

8. The liquid cooling assembly according to claim 1, wherein the cooling cavity is internally provided with a plurality of runner walls extending along the fluid flow direction, and cooling runners are enclosed between adjacent runner walls and between the runner walls and the inner wall of the cooling cavity; the cooling flow channels are not communicated with each other or at least a part of the cooling flow channels are communicated with each other.

9. The liquid cooling assembly of claim 8, wherein the flow channel walls extend along straight and/or curved lines.

10. The liquid cooling assembly of claim 9, wherein a flow guiding region is further disposed within the cooling chamber, the flow guiding region being disposed at an inlet end and/or an outlet end of the cooling flow channel and in communication with the cooling flow channel, the flow guiding region being configured to distribute fluid to a plurality of the cooling flow channels.

11. A battery pack, comprising a battery box, a battery module and the liquid cooling assembly according to any one of claims 1-10, wherein the liquid cooling assembly is arranged in the battery box, and the battery module is connected to the liquid cooling assembly in a matching manner.

12. The battery pack of claim 11, wherein the liquid cooling assembly is disposed at a bottom portion within the battery compartment; at least two opposite bottom edges in the battery box are provided with bosses protruding into the battery box, and matching parts on two sides of the cooling part are arranged on the inner sides of the bosses in the battery box.

13. The battery pack of claim 12, wherein the mating portion is an interference fit or a clearance fit with the boss.

14. The battery pack according to claim 13, wherein the battery module includes a plurality of cells and end plates provided at both ends of the plurality of cells, the end plates being provided with end plate mounting structures corresponding to the module mounting structures; the battery module is connected to the liquid cooling assembly in a matched manner through a connecting piece penetrating through the end plate mounting structure and the module mounting structure; and a plurality of battery cells are attached to the cooling part.

15. The battery pack according to claim 11, wherein the battery module is adhesively connected to the cooling portion;

and/or the liquid cooling assembly is connected with the battery box in an adhesive manner;

and/or the gap in the battery box is filled with heat-conducting glue.