CN218602586U - Battery module, battery pack and electrical equipment - Google Patents

Abstract

The present disclosure relates to a battery module, a battery pack, and an electric appliance. This battery module includes: a lower-layer battery pack; the upper battery pack is arranged on the lower battery pack, and the upper battery pack partially covers the lower battery pack; and the cooling assembly is arranged between the upper battery pack and the lower battery pack and comprises a liquid cooling plate and a turbulence piece, and the turbulence piece is arranged in the liquid cooling plate and corresponds to the upper battery pack. Improve the heat transfer ability of liquid cooling plate local area through the vortex piece, reduce the problem of upper battery group to the cooperation liquid cooling plate reduces the temperature of lower floor's group battery, reduces the difference in temperature of battery module, guarantees the performance of battery module. Meanwhile, after the turbulence piece is added to the liquid cooling plate, the battery module is not required to be cooled by adopting a scheme of double cooling plates, so that excessive space is not occupied, the complexity of the structure is reduced, the energy density of the battery pack is not influenced, and the use performance of the battery pack is ensured.

Description

Battery module, battery pack and electrical equipment

Technical Field

The disclosure relates to the technical field of electric equipment, in particular to a battery module, a battery pack and electric equipment.

Background

Along with electric automobile's development, to the continuous promotion that the continuation of the journey mileage required, power battery's electric quantity also constantly promotes, and more vehicle adopts great electric quantity battery, and this is higher just to whole car spatial arrangement requirement, consequently for more effective utilization space, a lot of power battery adopt local double-deck module to arrange, when guaranteeing battery energy density, still can not too much occupation space to satisfy electric automobile's user demand.

The arrangement form of above-mentioned local double-deck module leads to here calorific capacity higher, in order to guarantee that electric core is in the temperature, adopts two cold plates to cool off upper and lower layer module respectively usually to reduce power battery's temperature, guarantee power battery's performance. However, adopt two cold plate schemes to cooperate certain pipeline to cool off respectively about the module, can lead to always arranging the complicacy, occupy certain space, reduced the energy density of battery package system.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to adopt two cold plate cooling to lead to arranging the problem that the scheme is complicated, occupation space to local double-deck battery at present, provides one kind and can reduce occupation space, reduce structure complexity's battery module, battery package and electrical equipment when guaranteeing the radiating effect.

A battery module, comprising:

a lower-layer battery pack;

the upper-layer battery pack is arranged on the lower-layer battery pack, and the upper-layer battery pack partially covers the lower-layer battery pack; and

the cooling assembly, set up in upper battery group with between the lower floor's group battery, the cooling assembly includes liquid cooling board and vortex piece, vortex piece set up in the liquid cooling board, and correspond upper battery group sets up.

In an embodiment of the present disclosure, the liquid cooling plate includes two first cooling channels, a plurality of second cooling channels, an inlet pipe and an outlet pipe, the two first cooling channels are disposed at an edge of the liquid cooling plate, the plurality of second cooling channels are disposed between the two first cooling channels side by side, one end of each of the two first cooling channels is communicated with the inlet pipe, the other end of each of the two first cooling channels is respectively communicated with one end of each of the plurality of second cooling channels, and the other end of each of the plurality of second cooling channels is communicated with the outlet pipe;

the first cooling channel and the second cooling channel are provided with a plurality of cooling flow channels.

In an embodiment of the present disclosure, the first cooling channel includes a first cooling section and a second cooling section which are communicated, one end of the first cooling section is communicated with the inlet pipe, and one end of the second cooling section is communicated with the second cooling channel;

the number of the cooling runners in the first cooling section is larger than that of the cooling runners in the second cooling section, and the upper battery pack corresponds to the second cooling section of the liquid cooling plate.

In an embodiment of the present disclosure, the first cooling section has five cooling channels, and the second cooling section has three cooling channels;

each of the second cooling passages has at least three of the cooling flow passages.

In an embodiment of the present disclosure, the liquid cooling plate includes an upper plate and a lower plate, the upper plate has a first stamping area and a second stamping area arranged at an interval, the first stamping area, the second stamping area and the lower plate are respectively enclosed to form a first cooling area and a second cooling area, and the first cooling channel and the second cooling channel are located in the first cooling area and the second cooling area.

In an embodiment of the present disclosure, the upper plate further has a non-stamped area, the non-stamped area and the lower plate enclose a turbulent flow area, the turbulent flow member is disposed in the turbulent flow area, and the upper battery pack is disposed outside the turbulent flow area.

In an embodiment of the present disclosure, the spoiler has a plurality of spoiler channels, and the spoiler channels communicate with the first cooling channel or the second cooling channel at both sides.

In an embodiment of the present disclosure, the spoiler includes a spoiler, the spoiler forms protrusions arranged in rows and in a staggered manner by stamping, and the protrusions and a main body of the spoiler enclose the spoiler channel;

the surface of the bulge connected with the spoiler is a vertical surface and/or an inclined surface.

In an embodiment of the disclosure, the spoiler includes a spoiler and a plurality of spoiler, the plurality of spoiler is linear, curved, or a combination of linear and curved, and the spoiler enclose the spoiler channel.

In an embodiment of the present disclosure, the liquid-cooled plate further includes a mixed flow region, the mixed flow region is disposed at an end portion of the second cooling region far from the first cooling region, and the first cooling channel and the second cooling channel are communicated through the mixed flow region.

In an embodiment of the present disclosure, the battery module further includes a heat conducting structure adhesive, and the upper battery pack and the lower battery pack are adhered to the liquid cooling plate through the heat conducting structure adhesive.

A battery pack comprises a battery shell and a battery module according to any technical characteristic, wherein the battery module is arranged in the battery shell.

An electrical equipment comprises an equipment main body and a battery pack according to any one of the above technical characteristics, wherein the battery pack is arranged on the equipment main body and supplies power to the equipment main body.

The utility model discloses a battery module, battery package and electrical equipment, this battery module are local double-deck structural style, including upper assembled battery and lower floor's group battery, the upper assembled battery sets up in lower floor's group battery to the part covers lower floor's group battery, and cooling module sets up upper assembled battery and lower floor's group battery subassembly, cools off upper assembled battery and lower floor's group battery simultaneously. And, cooling unit includes liquid cooling board and vortex piece, and vortex piece sets up in the liquid cooling board, and upper battery group sets up the outside that corresponds vortex piece in the liquid cooling board outside.

Like this, when cooling medium flowed in the liquid cold plate, cooling medium can cool off the great lower floor group battery of area, reduces the temperature of lower floor group battery to guarantee the cooling performance of lower floor group battery. Meanwhile, the spoiler can increase the heat exchange area. When the cooling medium flows through the turbulence member, the turbulence member can perform turbulence on the cooling medium flowing through the turbulence member, so that the purpose of enhancing local turbulence is achieved, the heat exchange coefficient is improved, and the heat exchange capacity of the corresponding position of the turbulence member is improved. At the moment, the liquid cooling plate has stronger heat exchange capacity at the turbulent flow piece, and can cool the upper battery pack and the lower battery pack at two sides respectively to reduce the temperature of the upper battery pack.

This disclosed battery module sets up the liquid cooling board between upper battery group and lower floor's group battery, sets up the vortex piece in the liquid cooling board, and the vortex piece corresponds the part that upper battery group and lower floor's group battery are range upon range of. The heat exchange capacity of the local area of the liquid cooling plate is improved through the turbulence piece, the problem of the upper battery pack is reduced, the temperature of the lower battery pack is reduced by matching with the liquid cooling plate, the temperature difference of the battery module is reduced, and the use performance of the battery module is ensured. Simultaneously, this disclosed battery module increases the spoiler in the liquid cooling board after, need not to adopt the scheme of two cold drawing to cool off, can not occupy too much space, reduces the complexity of structure, can not influence the energy density of battery package, guarantees the performance of battery package.

Drawings

Fig. 1 is an exploded view illustrating a battery module according to an embodiment of the present disclosure;

fig. 2 is a schematic view of a liquid cooling plate in the battery module shown in fig. 1;

FIG. 3 is a top view of the liquid cooled plate of FIG. 2;

FIG. 4 is a schematic view of a turbulator embedded within the liquid-cooled plate shown in FIG. 3;

FIG. 5 is a perspective view of an embodiment of the spoiler shown in FIG. 4;

FIG. 6 is a side view of the spoiler shown in FIG. 5;

FIG. 7 is a perspective view of another embodiment of the spoiler shown in FIG. 4;

FIG. 8 is a side view of the spoiler shown in FIG. 7;

FIG. 9 is a perspective view of yet another embodiment of the spoiler shown in FIG. 5;

figure 10 is a top view of the spoiler shown in figure 8.

Wherein: A. a battery module; 100. a lower-layer battery pack; 200. an upper battery pack; 300. a cooling assembly; 310. a liquid-cooled plate; 311. a first cooling channel; 3111. a first cooling section; 3112. a second cooling section; 312. A second cooling channel; 313. a cooling channel; 314. a first cooling zone; 315. a second cooling zone; 316. A turbulent flow area; 317. a mixed flow region; 320. a spoiler; 330. an inlet pipe; 340. an outlet pipe; 400. and (4) heat-conducting structural adhesive.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, embodiments accompanying the present disclosure are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. The present disclosure may be embodied in many different forms than those described herein, and those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present disclosure, and therefore the present disclosure is not limited to the specific embodiments disclosed below.

In the description of the present disclosure, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the disclosure and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the disclosure.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.

In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In the present disclosure, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1 to 4, the present disclosure provides a battery module a. The battery module A is applied to the battery pack, and then the battery pack with the battery module A is applied to electrical equipment, so that power is supplied to the electrical equipment, and the use performance of the electrical equipment is guaranteed. In this embodiment, the electrical device to which the battery pack having the battery module a is applied is an electric vehicle. The battery pack with the battery module A can meet the requirement of electric quantity required by the endurance mileage of the electric automobile. Of course, in other embodiments of the present disclosure, the electrical device to which the battery pack is applied may also be other devices, apparatuses, and the like, which need to use the battery pack. Hereinafter, the battery pack will be described by way of example only as applied to an electric vehicle.

At present, a power battery in an electric automobile adopts a local double-layer module arrangement so as to meet the use requirement of the electric automobile. The arrangement form of local double-deck module leads to here calorific capacity higher, in order to guarantee that electric core is in the temperature, adopts two cold boards to cool off upper and lower layer module respectively usually to reduce power battery's temperature, guarantee power battery's performance. However, the upper module and the lower module are respectively cooled by adopting a double-cold-plate scheme and matching with a certain pipeline, so that the total arrangement is complex, a certain space is occupied, and the energy density of a battery pack system is reduced.

Therefore, the utility model provides a novel battery module A, this battery module A can satisfy the cooling demand of local bilayer structure form, reduces battery module A's the difference in temperature, guarantees battery module A's performance simultaneously, need not to adopt the structural style of two cold drawing, and then need not to occupy the inner space of battery package, reduces the complexity of structure, can not influence the energy density of battery package, guarantees the performance of battery package. The specific structure of the battery pack is described below.

Referring to fig. 1 to 4, in one embodiment, a battery module a includes a lower-stage battery pack 100, an upper-stage battery pack 200, and a cooling assembly 300. The upper cell stack 200 is disposed on the lower cell stack 100, and the upper cell stack 200 partially covers the lower cell stack 100. Cooling unit 300 set up in upper battery pack 200 with between lower floor's battery pack 100, cooling unit 300 includes liquid cooling board 310 and spoiler 320, spoiler 320 set up in the liquid cooling board 310, and correspond upper battery pack 200 sets up.

In order to better describe the structural form of the battery module a, the present disclosure will be described with reference to the direction shown in fig. 1. The lower battery pack 100 is located below, and the upper battery pack 200 is located above. The upper cell stack 200 is disposed above the lower cell stack 100. The lower battery pack 100 includes a plurality of unit cells arranged to form the lower battery pack 100. The upper battery pack 200 includes a plurality of unit cells arranged to form the upper battery pack 200.

The structure of each unit cell in the upper battery pack 200 is substantially the same as that of each unit cell in the lower battery pack 100. Only because the size of electrical equipment installation battery package is injectd, in order to satisfy the quantity that the electric quantity demand increases battery cell, only put the unable size demand that satisfies of one deck battery cell, so move partial battery cell to the upper strata, form the battery module A of local bilayer structure form.

Because only a part of the monomer cells are placed on the upper layer, the remaining more monomer cells are still placed on the lower layer, that is, the number of the monomer cells in the lower layer battery pack 100 is greater than that of the upper layer battery pack 200, and thus the area of the lower layer battery pack 100 is greater than that of the upper layer battery pack 200. In this way, after the upper-stage battery pack 200 is mounted on the lower-stage battery pack 100, the upper-stage battery pack 200 only partially covers the lower-stage battery pack 100.

The cooling module 300 is disposed between the lower battery pack 100 and the upper battery pack 200, and bonds the upper battery pack 200 and the lower battery pack 100. The cooling module 300 has a cooling medium flowing therein. The upper-stage battery pack 200 and the lower-stage battery pack 100 generate a large amount of heat during charge and discharge operations, and the cooling medium in the cooling module 300 absorbs the heat to lower the temperature of the upper-stage battery pack 200 and the lower-stage battery pack 100.

It is understood that, after the cooling module 300 is disposed between the upper battery pack 200 and the lower battery pack 100, a portion of the cooling module 300 is attached to only the lower battery pack 100, and a portion of the cooling module 300 is attached to both the upper battery pack 200 and the lower battery pack 100. At this time, the cooling module 300 of this portion needs to have a high heat dissipation capability to ensure the heat dissipation capability of the battery packs at both sides, i.e., where the upper battery pack 200 overlaps the lower battery pack 100.

Therefore, the cooling assembly 300 of the present disclosure adds the spoiler 320 in the liquid cooling plate 310, and the spoiler 320 can increase the contact area between the cooling medium and the liquid cooling plate 310, so as to increase the heat exchange area and improve the heat exchange capacity and the heat exchange efficiency. Therefore, after the spoiler 320 is disposed behind the liquid cooling plate 310 and the local heat exchange capability is improved, the lower battery pack 100 is disposed on the lower surface of the liquid cooling plate 310, and the upper battery pack 200 is disposed on the upper surface of the liquid cooling plate 310 and corresponds to the spoiler 320.

That is, the upper cell stack 200 is disposed above the spoiler 320, and the upper cell stack 200 is stacked on the lower cell stack 100 by the liquid cooling plate 310 and the spoiler 320 therein. In the process that the cooling medium flows in the liquid cooling plate 310, the liquid cooling plate 310 can cool the lower-layer cold plate through the cooling medium. When the cooling medium flows through the spoiler 320, the spoiler 320 increases the contact area with the cooling medium, and improves the heat exchange capacity of the cooling medium at the spoiler 320, and at this time, the cooling medium can cool the upper battery pack 200 and the lower battery pack 100 at the position, and reduce the temperatures of the upper battery pack 200 and the lower battery pack 100.

That is to say, set up spoiler 320 in liquid cooling plate 310 after, spoiler 320 can improve the local heat transfer ability of liquid cooling plate 310, improves the heat transfer ability of liquid cooling plate 310 in spoiler 320 department, and then improves in the great region of heat dissipation capacity to battery module A, reduces battery module A's the difference in temperature, reduces battery module A's temperature, guarantees battery module A's performance.

In the battery module a of the above embodiment, the liquid cooling plate 310 is disposed between the upper battery pack 200 and the lower battery pack 100, and the spoiler 320 is disposed in the liquid cooling plate 310, where the spoiler 320 corresponds to a portion where the upper battery pack 200 and the lower battery pack 100 are stacked. Improve the heat transfer ability of liquid cooling board 310 local area through vortex piece 320, reduce upper battery group 200's problem to cooperate liquid cooling board 310 to reduce the temperature of lower floor's group battery 100, reduce battery module A's the difference in temperature, guarantee battery module A's performance. Simultaneously, this disclosed battery module A increases spoiler 320 back in liquid cooling plate 310, need not to adopt the scheme of two cold plates to cool off, can not occupy too much space, reduces the complexity of structure, can not influence the energy density of battery package, guarantees the performance of battery package.

Referring to fig. 1 to 4, in an embodiment, the liquid-cooling plate 310 includes two first cooling channels 311, a plurality of second cooling channels 312, an inlet pipe 330 and an outlet pipe 340, the two first cooling channels 311 are disposed at an edge position of the liquid-cooling plate 310, the plurality of second cooling channels 312 are disposed side by side between the two first cooling channels 311, one ends of the two first cooling channels 311 are communicated with the inlet pipe 330, the other ends of the two first cooling channels 311 are respectively communicated with one ends of the plurality of second cooling channels 312, and the other ends of the plurality of second cooling channels 312 are communicated with the outlet pipe 340.

The liquid cooling plate 310 has a hollow structure in which a cooling medium flows, so that the cooling medium can absorb heat of the upper cell stack 200 and the lower cell stack 100 through the liquid cooling plate 310, and reduce the temperature of the upper cell stack 200 and the lower cell stack 100. Alternatively, the cooling medium is cooling water or other liquid or gas capable of flowing in the liquid cooling plate 310, and the like.

In order to ensure the cooling effect of the cooling medium, the present disclosure divides the space in the liquid-cooled plate 310 into the first cooling passages 311 and the second cooling passages 312, and the number of the first cooling passages 311 is two, and the number of the second cooling passages 312 is plural, and the two first cooling passages 311 are disposed at the edge positions of the liquid-cooled plate 310 and extend in the length direction of the liquid-cooled plate 310, and the plural second cooling passages 312 are disposed side by side in the space between the two first passages and extend in the length direction of the liquid-cooled plate 310.

It can be understood that after the single cells of the upper cell group 200 and the lower cell group 100 are arranged, the positive terminals and the negative terminals of the single cells face to the two sides of the single cells, and after the cell groups are formed, the positive terminals and the negative terminals are located at the two sides of the upper cell group 200 and the two sides of the lower cell group 100. When the battery module A is charged and discharged, the positive end and the negative end are heating main bodies, and the heat dissipation capacity of the middle area of each single battery cell is small, namely, the single battery has small heat dissipation capacity in the middle and large heat dissipation capacity at the two ends.

Therefore, in the liquid cooling plate 310 of the present disclosure, two first cooling channels 311 are disposed corresponding to the positive terminals and the negative terminals of the upper battery pack 200 and the lower battery pack 100, one of the first cooling channels 311 corresponds to the positive terminal of each battery cell, and the other first cooling channel 311 corresponds to the negative terminal of each battery cell. And, one ends of the two first cooling passages 311 communicate with the inlet pipe 330. That is to say, the cooling liquid entering the liquid cooling plate 310 first enters the first cooling passage 311, and at this time, the cooling medium does not absorb heat, and directly enters the first cooling passage 311 to cool the positive electrode end and the negative electrode end, thereby ensuring the cooling effect.

A plurality of second cooling channels 312 are disposed between two first cooling channels 311, and the plurality of second cooling channels 312 correspond to the middle regions of the respective unit cells. One ends of the plurality of second cooling passages 312 communicate with the other ends of the two first cooling passages 311, and the other ends of the plurality of second cooling passages 312 communicate with the outlet pipe 340. Like this, the cooling medium after absorbing heat in first cooling channel 311 enters into second cooling channel 312, cools off second cooling channel 312, can satisfy the regional heat dissipation demand in each battery cell middle part, and then reduces each battery cell's the difference in temperature, holds the pillow cooling effect.

As shown in fig. 3, the first cooling passage 311 communicates with the inlet pipe 330 at one end on the left side, communicates with the second cooling passage 312 at one end on the right side at the other end on the right side, and communicates with the outlet pipe 340 at the other end on the left side of the second cooling passage 312. After entering the inlet pipe 330, the external cooling fluid is divided into two first cooling channels 311, and the cooling medium absorbs heat from the ends of the upper-layer battery pack 200 and the lower-layer battery pack 100 while flowing through the first cooling channels 311. Then, the cooling medium in the two first cooling channels 311 flows into the plurality of second cooling channels 312 at the end portions of the liquid cooling plates 310, and the cooling medium flows out through the outlet pipe 340 after absorbing heat of the upper battery pack 200 and the lower battery pack 100 during the flow of the second cooling channels 312.

The inlet pipe 330 and the outlet pipe 340 are connected to a cold source. After the cooling medium output from the outlet pipe 340 enters the cold source, the cold source cools the cooling medium to reduce the temperature of the cooling medium, and then the cooling medium is delivered into the cold plate through the inlet pipe 330 to circularly cool the upper battery pack 200 and the lower battery pack 100. The battery module A is cooled in a circulating reciprocating mode, the temperature of the upper battery pack 200 and the temperature of the lower battery pack 100 are reduced, and the temperature difference of the battery module A is reduced.

Of course, in other embodiments of the present disclosure, the liquid cooling plate 310 may further have a plurality of cooling channels 313, and the plurality of cooling channels 313 is disposed between the first cooling channel 311 and the second cooling channel 312, so as to increase the flow path of the cooling medium.

In one embodiment, the first cooling channel 311 and the second cooling channel 312 have a plurality of cooling channels. That is to say, the first cooling channel 311 is subdivided into a plurality of cooling channels, and the second cooling channel 312 is subdivided into a plurality of cooling channels, so that when the cooling medium flows in the first cooling channel 311 and the second cooling channel 312, the cooling medium can be divided into the cooling channels, thereby avoiding the cooling medium from being mixed, and ensuring the cooling effect.

In an embodiment, the first cooling passage 311 includes a first cooling section 3111 and a second cooling section 3112 which are communicated with each other, one end of the first cooling section 3111 is communicated with the inlet pipe 330, and one end of the second cooling section 3112 is communicated with the second cooling passage 312. The number of the cooling channels in the first cooling section 3111 is greater than the number of the cooling channels in the second cooling section 3112, and the upper battery pack 200 corresponds to the second cooling section 3112 of the liquid-cooled panel 310.

The first cooling passage 311 is divided into two sections, namely a first cooling section 3111 and a second cooling section 3112, one end of the first cooling section 3111 is communicated with the inlet pipe 330, the other end of the first cooling section 3111 is communicated with one end of the second cooling section 3112, and the other end of the second cooling section 3112 is communicated with the second cooling passage 312. The first cooling section 3111 is provided only at both ends of the lower battery pack 100, and the second cooling section 3112 partially corresponds to both ends of the lower battery pack 100 and partially corresponds to both ends of the upper battery pack 200 and the lower battery pack 100. That is, the cooling capacity of the cooling medium in the second cooling section 3112 needs to satisfy the heat dissipation requirements of the upper battery pack 200 and the lower battery pack 100, and the cooling capacity of the cooling medium in the first cooling section 3111 only needs to satisfy the lower battery pack 100.

Therefore, the present disclosure sets the first cooling passages 311 to have the number of cooling flow passages in the first cooling section 3111 smaller than the number of cooling passages 313 in the second cooling section 3112. That is, the cooling flow passage in the first cooling passage 311 is reduced in the middle region of the liquid cooling plate 310, and the width of the first cooling flow passage is wider at the left end and narrower at the middle position. Thus, when the cooling medium flows from the first cooling section 3111 to the second cooling section 3112, the width of the passage becomes narrow, and the flow rate of the cooling medium is increased to improve the heat exchange capacity.

That is, the flow rate of the cooling medium in the second cooling section 3112 is fast, so that the cooling medium has a strong heat exchange capability in the second cooling section 3112. Like this, the in-process that cooling medium flowed in second cooling section 3112, the heat of absorption upper strata group battery 200 and lower floor's group battery 100 that can be better realizes cooling in the higher region of calorific capacity, guarantees the cooling effect, reduces the difference in temperature between upper strata group battery 200 and the lower floor's group battery 100.

In one embodiment, the width of the first cooling section 3111 is 1/5 to 1/6 of the width of the liquid cooling plate 310.

In one embodiment, the first cooling section 3111 has five cooling channels, and the second cooling section 3112 has three cooling channels. Each of the second cooling passages 312 has at least three cooling flow passages. That is, the width of the second cooling section 3112 is 3/5 of the width of the first cooling section 3111.

When the cooling medium flows through the first cooling section 3111, the cooling medium flows through five cooling flow passages; when the cooling medium enters the three flow passages of the second cooling section 3112 from the five cooling flow passages, the flow width of the cooling medium is narrowed to increase the flow velocity of the cooling medium, thereby improving the heat exchange capability of the cooling medium in the second cooling section 3112.

The number of the cooling channels in the second cooling channel 312 is not limited in principle, as long as the cooling medium is ensured to flow smoothly, the occurrence of mixed flow is avoided, and the flow of the cooling medium in the second cooling channel 312 is ensured to meet the heat dissipation requirements of the middle regions of the upper battery pack 200 and the lower battery pack 100.

Of course, in other embodiments of the disclosure, the number of cooling flow passages in the first cooling section 3111 and the second cooling section 3112 may be other, as long as it is ensured that the number of cooling flow passages in the first cooling section 3111 is greater than that in the second cooling section 3112.

In one embodiment, the liquid cooling plate 310 includes an upper plate and a lower plate, the upper plate has a first stamping region and a second stamping region arranged at an interval, the first stamping region, the second stamping region and the lower plate respectively enclose a first cooling region 314 and a second cooling region 315, and the first cooling channel 311 and the second cooling channel 312 are located in the first cooling region 314 and the second cooling region 315.

The liquid cooling plate 310 comprises an upper plate and a lower plate, wherein the edges of the upper plate and the lower plate are welded through a brazing process, so that the upper plate and the lower plate are connected in an involutory manner, and the complete liquid cooling plate 310 is formed. The upper plate adopts a stamping mode to form a plurality of convex ribs, the convex ribs at different positions are arranged along the same direction to form a plurality of grooves, after the upper plate and the lower plate are closed, the lower plate encloses the grooves into cooling channels, and the plurality of cooling channels form a group of cooling channels 313.

Fig. 3 is a top view of the liquid cooling plate 310 shown in fig. 2. The liquid-cooled plate 310 is divided into a first cooling zone 314 on the left and a second cooling zone 315 on the right, from left to right according to fig. 3. The upper plate is partially punched to form a first punching area on the left side and a second punching area on the right side, the first punching area and the second punching area are arranged at intervals, after the upper plate and the lower plate are combined, the first punching area and the lower plate are surrounded to form a first cooling area 314 on the left side, and the second punching area and the lower plate are surrounded to form a second cooling area 315 on the right side. The first cooling zone 314 is spaced apart from the second cooling zone 315.

A spoiler 320 is disposed between the first cooling zone 314 and the second cooling zone 315. The first cooling passage 311 and the second cooling passage 312 extend in the longitudinal direction of the liquid cooling plate 310 (i.e., in the left-right direction of fig. 3). The first cooling channel 311 and the second cooling channel 312 are provided disconnected at the spoiler 320. The first cooling channel 311 is divided into two parts, one part of the first cooling channel 311 is located in the first stamped area, the other part of the first cooling channel 311 is located in the second stamped area, and the two parts of the first cooling channel 311 are communicated through the spoiler 320. The second cooling channel 312 is divided into two parts, one part of the second cooling channel 312 is located in the first ram area, the other part is located in the second ram area, and the two parts of the second cooling channel 312 are communicated through the spoiler 320.

The spoiler 320 is disposed corresponding to the upper-stage battery pack 200, and after the cooling medium enters the first cooling passage 311, the cooling medium flows in the first cooling section 3111 to cool a corresponding portion of the lower-stage battery pack 100. When the cooling medium enters the second cooling section 3112 from the first cooling section 3111, the flow rate of the cooling medium increases, increasing the cooling capacity in the second cooling section 3112. Meanwhile, the cooling medium in the second cooling section 3112 enters the spoiler 320, and the heat exchange area is further increased by the spoiler 320, thereby improving the heat exchange capacity to cool the corresponding portions of the lower-layer battery pack 100 and the upper-layer battery pack 200.

After flowing out of the spoiler 320, the cooling medium continues to flow in the second cooling section 3112 to cool the lower battery pack 100, and then, the cooling medium enters the second cooling passage 312, and cools the lower battery pack 100 and the upper battery pack 200 during the flow.

In one embodiment, the upper plate further has a non-impact area, the non-impact area and the lower plate are enclosed to form a turbulent flow area 316, the spoiler 320 is disposed at the turbulent flow area 316, and the upper battery pack 200 is disposed outside the turbulent flow area 316.

The non-stamped area is disposed between the first stamped area and the second stamped area. After the upper plate and the lower plate are connected in an involution manner, the non-punching area and the lower plate are enclosed to form a turbulent flow area 316, and a turbulent flow member 320 is installed in the turbulent flow area 316. The upper plate is provided with a local punching region, and a first punching region, a non-punching region and a second punching region are respectively arranged from left to right in fig. 3. After the upper battery pack 200 is disposed corresponding to the turbulent flow region 316, a turbulent flow effect can be ensured, which does not affect the flow of the cooling medium, and the cooling effect of the upper battery pack 200 and the lower battery pack 100 is ensured.

It can be understood that, in the present disclosure, no stamped region is provided on the upper plate corresponding to the upper battery pack 200, which is mainly because the stamped turbulator pillars are limited by the small number of process means, the contact area with the cooling medium is small, the contact area with the fluid is small, and the heat exchange capability is hindered; moreover, there are many pits between the upper plate and the upper battery pack 200, and the thermal resistance is increased due to the increased filling of the heat-conducting glue, thereby reducing the heat exchange efficiency.

To this end, the present disclosure provides a non-punched region on the upper plate, which corresponds to the upper battery pack 200, and a spoiler 320 in the non-punched region. That is, the spoiler 320 is embedded in the liquid-cooling plate 310 and is fixed to the upper and lower plates by brazing. Like this, can not have the pit on the upper plate, the area of contact of upper plate and upper battery 200 can also increase the heat transfer area of cooling mechanism and vortex piece 320 simultaneously, and the local vortex of reinforcing promotes heat transfer coefficient.

In one embodiment, the spoiler 320 has a plurality of spoiler channels, which communicate with the first cooling channels 311 or the second cooling channels 312 on both sides. The spoiler 320 is provided with a spoiler channel, which is connected to the first cooling channel 311 at the edge and to the second cooling channel 312 at the middle region. The cooling medium can enter the first cooling channel 311 through the spoiler channel, and the cooling medium can also enter the second cooling channel 312 through the spoiler channel.

The vortex passageway can increase the area of contact of coolant and vortex piece 320, and then improves the heat exchange efficiency of coolant in vortex piece 320 department, strengthens local vortex, promotes the heat transfer coefficient, guarantees the heat transfer effect to upper assembled battery 200 and lower floor's assembled battery 100.

In an embodiment of the present disclosure, the spoiler 320 includes a spoiler, the spoiler forms protrusions arranged in rows and in a staggered manner by stamping, and the protrusions and a main body of the spoiler enclose the spoiler channel. The spoiler forms the alternately arranged bulges in a stamping mode, and the bulges and the main body of the spoiler form a groove for cooling medium to flow and increasing the heat exchange area.

Optionally, the surface of the protrusion connected with the spoiler is a vertical surface and/or an inclined surface. As shown in the figure, the surface of the protrusion connected with the spoiler is a vertical surface, so that a structure similar to an I shape is formed. As shown in the figure, the surface of the bulge connected with the spoiler is a combination of an inclined surface and a vertical surface, and a trapezoid-like structure is formed.

In another embodiment of the present disclosure, the spoiler 320 includes a spoiler and a plurality of spoiler bodies, the plurality of spoiler bodies are linear, curved, or a combination of linear and curved, and the spoiler body enclose the spoiler channel.

As shown in the figure, a plurality of wavy turbulent flow bodies are arranged on the spoiler, and a turbulent flow channel is formed by enclosing the turbulent flow bodies and the spoiler, so that the heat exchange area is increased, and the heat exchange effect is ensured. Of course, in other embodiments, the flow disturbing body may have other shapes capable of increasing the heat exchange area.

Of course, in other embodiments of the present disclosure, the structure of the spoiler 320 may also be in other shapes as long as the heat exchange area can be increased and the heat exchange effect can be ensured. The specific structure of the spoiler 320 may be selected according to the actual space and size of the spoiler 316.

In an embodiment, the liquid-cooled plate 310 further includes a flow mixing region 317, the flow mixing region 317 is disposed at an end of the second cooling region 315 away from the first cooling region 314, and the first cooling channel 311 is in communication with the second cooling channel 312 via the flow mixing region 317. That is, in fig. 3, the mixed flow region 317 is provided at the rightmost end of the liquid-cooled plate 310, and the mixed flow region 317 communicates the first cooling passage 311 with the second cooling passage 312, so that the cooling medium in the first cooling passage 311 enters the second cooling region 315 through the mixed flow region 317.

Optionally, the direction of the cooling flow channel in the mixed flow region 317 is perpendicular to the direction of the cooling flow channel in the first cooling channel 311 and the second cooling channel 312, so that the cooling medium in the first cooling channel 311 enters the mixed flow region 317 and flows in the mixed flow region 317 into the second cooling channel 312. The cooling channel 313 of the mixed flow area 317 is formed by punching the upper plate.

In an embodiment, the battery module a further includes a heat conductive adhesive 400, and the upper battery pack 200 and the lower battery pack 100 are adhered to the liquid cooling plate 310 through the heat conductive adhesive 400. The heat-conducting structural adhesive 400 can fill the gap between the liquid cooling plate 310 and the single battery cell, so that the thermal resistance is reduced, and meanwhile, the heat-conducting structural adhesive 400 has good adhesion and improves the overall structural strength.

The battery module a of the above embodiment embeds the spoiler 320 in the liquid cooling plate 310, improves the local heat exchange ability of the liquid cooling plate 310 through the spoiler 320, increases the heat exchange area, improves the heat exchange ability of the cooling medium to the problem of the upper battery pack 200 and the lower battery pack 100 is effectively reduced, and simultaneously, narrows down the first cooling flow channel near the spoiler 320 to increase the flow velocity of the cooling medium, and improve the heat exchange ability of the cooling medium. Moreover, after the spoiler 320 is added in the liquid cooling plate 310, the battery module A does not need to adopt a scheme of double cold plates for cooling, does not occupy too much space, reduces the complexity of the structure, does not influence the energy density of the battery pack, and ensures the use performance of the battery pack.

The present disclosure further provides a battery pack, which includes a battery housing and the battery module according to any of the above embodiments, wherein the battery module is disposed in the battery housing.

The present disclosure further provides an electrical apparatus, including an apparatus main body and the battery pack according to the above embodiment, where the battery pack is disposed in the apparatus main body and supplies power to the apparatus main body.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-described embodiments are merely illustrative of several embodiments of the present disclosure, which are described in more detail and detailed, but are not to be construed as limiting the scope of the disclosure. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the concept of the present disclosure, and these changes and modifications are all within the scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the appended claims.

Claims (13)

1. A battery module (A), characterized by comprising:

a lower-layer battery pack (100);

an upper-layer battery pack (200) that is provided to the lower-layer battery pack (100), and the upper-layer battery pack (200) partially covers the lower-layer battery pack (100); and

cooling module (300), set up in upper battery group (200) with between lower floor's battery group (100), cooling module (300) include liquid cooling board (310) and vortex piece (320), vortex piece (320) set up in liquid cooling board (310), and correspond upper battery group (200) set up.

2. The battery module (A) according to claim 1, wherein the liquid-cooled plate (310) comprises two first cooling channels (311), a plurality of second cooling channels (312), an inlet pipe (330) and an outlet pipe (340), the two first cooling channels (311) are disposed at an edge position of the liquid-cooled plate (310), the plurality of second cooling channels (312) are disposed side by side between the two first cooling channels (311), one ends of the two first cooling channels (311) are communicated with the inlet pipe (330), the other ends of the two first cooling channels (311) are respectively communicated with one ends of the plurality of second cooling channels (312), and the other ends of the plurality of second cooling channels (312) are communicated with the outlet pipe (340);

the first cooling channel (311) and the second cooling channel (312) are provided with a plurality of cooling flow channels.

3. The battery module (A) according to claim 2, wherein the first cooling passage (311) includes a first cooling section (3111) and a second cooling section (3112) that communicate, one end of the first cooling section (3111) communicates with the inlet duct (330), and one end of the second cooling section (3112) communicates with the second cooling passage (312);

the number of the cooling flow passages in the first cooling section (3111) is greater than the number of the cooling flow passages in the second cooling section (3112), and the upper battery pack (200) corresponds to the second cooling section (3112) of the liquid cooling plate (310).

4. The battery module (A) according to claim 3, wherein the first cooling section (3111) has five cooling flow passages, and the second cooling section (3112) has three cooling flow passages;

each of the second cooling passages (312) has at least three of the cooling flow channels.

5. The battery module (a) of claim 2, wherein the liquid-cooled plate (310) comprises an upper plate and a lower plate, the upper plate has a first stamped area and a second stamped area which are arranged at intervals, the first stamped area, the second stamped area and the lower plate are respectively enclosed into a first cooling area (314) and a second cooling area (315), and the first cooling channel (311) and the second cooling channel (312) are located in the first cooling area (314) and the second cooling area (315).

6. The battery module (A) according to claim 5, wherein the upper plate further has a non-impact area, the non-impact area and the lower plate enclosing a turbulent flow region (316), the spoiler (320) being disposed at the turbulent flow region (316), and the upper battery pack (200) being disposed outside the turbulent flow region (316).

7. The battery module (A) according to any one of claims 2 to 6, wherein the spoiler (320) has a plurality of spoiler channels communicating on both sides with the first cooling channel (311) or with the second cooling channel (312).

8. The battery module (A) according to claim 7, wherein the spoiler (320) comprises spoilers, the spoilers are formed by stamping into protrusions arranged in rows and in a staggered manner, and the protrusions and the main body of the spoiler enclose the spoiler channel;

the surface of the protrusion connected with the spoiler is a vertical surface and/or an inclined surface.

9. The battery module (A) of claim 7, wherein the spoiler (320) comprises a spoiler and a plurality of spoiler members, the plurality of spoiler members are linear, curved or split-jointed linear and curved, and the spoiler members surround the spoiler channel.

10. The battery module (A) according to claim 5 or 6, wherein the liquid-cooled plate (310) further comprises a mixed flow region (317), the mixed flow region (317) is provided at an end of the second cooling region (315) away from the first cooling region (314), and the first cooling channel (311) and the second cooling channel (312) are communicated through the mixed flow region (317).

11. The battery module (A) according to any one of claims 1 to 6, wherein the battery module (A) further comprises a heat-conducting structural adhesive (400), and the upper-layer battery pack (200) and the lower-layer battery pack (100) are adhered to the liquid cooling plate (310) through the heat-conducting structural adhesive (400).

12. A battery pack characterized by comprising a battery case and the battery module (a) according to any one of claims 1 to 11, the battery module (a) being disposed in the battery case.

13. An electric appliance characterized by comprising an appliance main body and the battery pack according to claim 12, the battery pack being provided to the appliance main body and supplying power to the appliance main body.

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