CN217426884U - Battery pack - Google Patents

Abstract

The application relates to the field of batteries, in particular to a battery pack. The battery pack comprises a base plate, two frame bodies and a plurality of cold plates, wherein two cold plates in the plurality of cold plates are integrally formed with the two frame bodies respectively, the rest cold plates in the plurality of cold plates are integrally formed with at least part of the base plate respectively, and the two frame bodies are arranged on two sides of the base plate respectively. According to the battery package of this application, in the connected mode of having solved current cold drawing, not only structural strength is low, and is higher to the tolerance requirement of continuous spare part moreover, and volume production product uniformity is also relatively poor problem.

Description

Battery pack

Technical Field

The application relates to the field of batteries, in particular to a battery pack.

Background

With the rise of new energy industry, electric vehicles are developed at an accelerated speed, the design of safety, light weight, standardization, low cost and the like of a power battery pack becomes an important factor restricting the popularization of new energy vehicles, the service life of the battery pack is prolonged, the cycle life of the battery pack is prolonged, the safety of the battery pack is improved, and a battery pack cold plate system becomes a hot spot of current research.

Battery package cold drawing system is through the heat of circulating rivers through water-cooling board in order to take away the battery promptly, but in the cold drawing structure of current, the cold drawing all adopts punching press or section bar extrusion technology shaping, then is being connected cold drawing alone with outside casing or bottom plate, to this, not only structural strength of this kind of connected mode is low, and the tolerance requirement to continuous spare part is higher moreover, and volume production product uniformity is also relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a purpose is to provide a battery package to in the connected mode of having solved current cold drawing, not only structural strength is low, and is higher to the tolerance requirement of continuous spare part moreover, and the volume production product uniformity is also relatively poor problem.

According to the application, a battery pack is provided, the battery pack comprises a base plate, two frame bodies and a plurality of cold plates, wherein the two cold plates are integrally formed with the two frame bodies respectively, the rest cold plates in the cold plates are integrally formed with at least parts of the base plate respectively, and the two frame bodies are arranged on two sides of the base plate respectively.

In any of the above technical solutions, further, the plurality of cold plates are arranged in parallel, the plurality of cold plates are perpendicular to the base plate, and a battery module is disposed between any two adjacent cold plates.

In any of the above technical solutions, further, the frame body includes a support portion and a base, in a use state of the battery pack, the base is disposed at the bottom of the support portion, the cold plate is disposed at a side portion of the support portion, the base is connected to an upper surface of the base plate, and the cold plate is formed into a rectangular plate.

In any of the above technical solutions, further, the battery pack further includes a first pipeline and a second pipeline, a first flow channel and a second flow channel are provided inside each of the plurality of cold plates, the first flow channel and the second flow channel of each of the plurality of cold plates are communicated, each of the first flow channels is communicated with the first pipeline, each of the second flow channels is communicated with the second pipeline, the first pipeline is provided with a water inlet, and the second pipeline is provided with a water outlet.

In any of the above technical solutions, further, the battery pack further includes two first connecting members and a plurality of water nozzles, two cold plates disposed on the two frame bodies correspond to the two first connecting members, respectively, and one end of each of the two cold plates disposed on the two frame bodies is connected to the corresponding first connecting member; one end of each cold plate arranged on the two frame bodies is respectively connected with the two first connecting pieces, the inner side parts of the two first connecting pieces are respectively provided with a water inlet and a water outlet, the water inlet is communicated with the first flow channel, the water outlet is communicated with the second flow channel, each water nozzle comprises a third pipeline, a fourth pipeline and a second connecting piece, the third pipeline and the fourth pipeline all penetrate through the second connecting piece, the third pipeline and the fourth pipeline are parallel, the two ends of the third pipeline and the fourth pipeline are arranged in an open mode, the number of the rest cold plates is equal to and in one-to-one correspondence with the number of the water nozzles, one end of each cold plate in the rest cold plates is connected to one end of the second connecting piece of the corresponding water nozzle and is communicated with the third pipeline and the first flow channel, and the fourth pipeline and the second flow channel are communicated with each other cold plate, the first pipeline comprises a plurality of first branch pipelines, the second pipeline comprises a plurality of second branch pipelines, the first branch pipelines are connected with two water inlets and a plurality of third pipelines respectively, and the second branch pipelines are connected with two water outlets and a plurality of fourth pipelines respectively.

In any of the above technical solutions, further, the battery pack further includes a water inlet pipe, a water outlet pipe, and a plurality of adapter plates corresponding to the plurality of water nozzles one to one, the water inlet pipe is communicated with the water inlet, the water outlet pipe is communicated with the water outlet, the bottom end of the adapter plate is connected to the bottom plate, and the side portion of the adapter plate is connected to the other end of the second connecting piece.

In any of the above technical solutions, further, the base plate includes a plurality of sections connected in sequence, each of the plurality of sections is integrally formed with at least one of the cold plates, and a first one of the plurality of sections and a last one of the plurality of sections are respectively connected to the two rack bodies.

In any of the above technical solutions, further, the battery pack further includes a heat insulating layer, and the heat insulating layers are disposed between the bottom plate and the battery module and at the outer side of the frame body.

In any of the above technical solutions, further, the battery pack further includes a heat conduction layer, and the heat conduction layer is disposed between the inner side portions of any two adjacent cold plates and the two side portions of the battery module.

In any of the above technical solutions, further, two of the cold plates and the two frame bodies are respectively formed by extruding a profile into a whole, and the rest of the cold plates and at least a portion of the base plate are respectively formed by extruding a profile into a whole.

According to the battery package of this application, the battery package includes the bottom plate, two support bodies and a plurality of cold drawing, wherein, two cold drawing in a plurality of cold drawing respectively with two support body integrated into one piece, all the other cold drawing in a plurality of cold drawing respectively with the at least partial integrated into one piece of bottom plate, two support bodies set up respectively in the both sides of bottom plate, all cold drawing of this application all with support body or bottom plate integrated into one piece, for the connected mode of current cold drawing, not only structural strength is high, and need not extra connecting spare part, the volume production product uniformity also improves greatly.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

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

FIG. 1 illustrates a schematic view of a plurality of cold plates each integrally formed in accordance with an embodiment of the present application;

fig. 2 shows an overall structural schematic diagram of a battery pack according to an embodiment of the present application;

fig. 3 shows a schematic structural view of a cold plate in a separated state from a battery module according to an embodiment of the present application;

fig. 4 shows a partial structural schematic diagram of a battery pack according to an embodiment of the present application;

fig. 5 illustrates a partial structural schematic view of a battery pack according to an embodiment of the present application;

fig. 6 shows another partial structural schematic view of a battery pack according to an embodiment of the present application;

fig. 7 illustrates yet another partial structural schematic view of a battery pack according to an embodiment of the present application;

fig. 8 shows a further partial structural view of a battery pack according to an embodiment of the present application.

Icon: 100-a base plate; 101-first section; 102-a second segment; 103-a third section; 200-frame body; 201-a support; 202-a base; 300-a cold plate; 301-a first flow channel; 3011-a first shunt; 302-a second flow channel; 3021-a second shunt; 401-water inlet pipe; 402-a water outlet pipe; 500-a battery module; 600-an adapter plate; 701-a first conduit; 7011-a first branch conduit; 702-a second conduit; 7021-a second branch conduit; 800-a first connector; 901-a second connector; 902-a third conduit; 903-fourth conduit.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent after understanding the disclosure of the present application.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly over" or "directly overlying" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section discussed in the examples described herein could be termed a second member, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

The application provides a battery pack to in the connected mode of having solved current cold drawing, not only structural strength is low, and is higher to the tolerance requirement of continuous spare part moreover, and volume production product uniformity is also relatively poor problem.

Battery package cold drawing system is through the heat of circulating rivers through water-cooling board in order to take away the battery promptly, but before this application proposes, in the current cold plate structure, the cold plate all adopts punching press or section bar extrusion technology shaping, then is being connected the cold plate alone with outside casing or bottom plate, to this, not only structural strength of this kind of connected mode is low, and the tolerance to continuous spare part requires highly moreover, and the volume production product uniformity is also relatively poor.

In view of this, according to the application, provide a battery package, the battery package includes the bottom plate, two support bodies and a plurality of cold drawing, wherein, two cold drawing in a plurality of cold drawing respectively with two support body integrated into one piece, all the other cold drawing in a plurality of cold drawing respectively with the at least partial integrated into one piece of bottom plate, two support bodies set up respectively in the both sides of bottom plate, all cold drawing of this application all with support body or bottom plate integrated into one piece, here, integrated into one piece's mode can be section bar extrusion integrated into one piece, for the connected mode of current cold drawing, not only structural strength is high, and need not extra connection spare part, volume production product uniformity also improves greatly. The specific structure of the base, the frame, and the cold plate will be described in detail below.

In an embodiment of the present application, the base plate may include a plurality of segments connected in sequence, each of the plurality of segments being integrally formed with at least one cold plate, a first one of the plurality of segments and a last one of the plurality of segments being connected to the two shelves, respectively.

As an example, as shown in fig. 1, the battery pack may include six cold plates 300, the base plate 100 may include a first section 101, a second section 102, and a third section 103, the first section 101 may be integrally formed with one cold plate 300, the second section 102 may be integrally formed with two cold plates 300, the third section 103 may be integrally formed with one cold plate 300, the first section 101 may be connected between one of the two holders 200 and the second section 102, the second section 102 may be connected between the first section 101 and the third section 103, and the third section 103 may be connected between the second section 102 and the other of the two holders 200. Here, all three of the first segment 101, the second segment 102, and the third segment 103 may be welded.

Further, as shown in fig. 1, 7 and 8, each of the two shelves 200 may include a support portion 201 and a base 202, the base 202 is disposed at the bottom of the support portion, the cold plate 300 is disposed at a side portion of the support portion 201, and the base 202 is coupled to the upper surface of the base plate 100, for example, by bolts, in a state in which the battery pack is used, and here, the cold plate 300 may be formed in a rectangular shape.

In an embodiment of the present application, as shown in fig. 2 and 3, a plurality of cold plates 300 (six cold plates 300) may be arranged in parallel, with a battery module 500 disposed between any two adjacent cold plates 300. Here, a heat conduction layer may be disposed between the inner sides of any two adjacent cold plates 300 and the two sides of the battery module 500, for example, the sides of the battery module 500 may be coated with a heat conduction structural adhesive to adhere the cold plates 300 together.

In addition, in order to improve the heat insulation performance of the battery pack, heat insulation layers may be disposed between the base plate 100 and the battery module 500 and at the outer side portion of the bracket, for example, heat insulation foam is attached between the upper surface of the base plate 100 and the bottom of the battery module 500, and heat insulation foam is attached at the outer side portion of the bracket.

In an embodiment of the present application, as shown in fig. 2 to 4, the battery pack may further include a first pipe 701 and a second pipe 702, the inside of each of the plurality of cold plates 300 is provided with a first flow channel 301 and a second flow channel 302, the first flow channel 301 and the second flow channel 302 of each of the plurality of cold plates 300 are communicated, that is, the first end of each of the plurality of cold plates 300 can be formed with a first flow channel 301 opening and a second flow channel 302 opening, the end of the first flow channel 301 is communicated with the end of the second flow channel 302, the flow channels form a substantially U shape, the plurality of first flow channels 301 are communicated with the first pipe 701, the plurality of second flow channels 302 are communicated with the second pipe 702, the first pipe 701 is provided with a water inlet, and the second pipe 702 is provided with a water outlet. That is, the liquid enters from the water inlet of the first pipe 701 and then enters the first flow channel 301 of each cold plate 300, the first flow channel 301 of each cold plate 300 flows through the second flow channel 302 again, and then the liquid flowing out of the second flow channel 302 of each cold plate 300 is collected to the second pipe 702 and finally flows out of the water outlet of the second pipe 702.

As an example, as shown in fig. 2 to 8, the battery pack may further include two first connectors 800 and a plurality of water nozzles (four water nozzles), one ends of two cold plates 300 disposed on the two holder bodies 200 are respectively connected to the two first connectors 800, inner sides of the two first connectors 800 are respectively provided with a water inlet and a water outlet, the water inlet is communicated with the first flow channel 301, the water outlet is communicated with the second flow channel 302, wherein each of the plurality of water nozzles includes a third pipe 902, a fourth pipe 903, and a second connector 901, where the first connector 800 and the second connector 901 may be plate members, the third pipe 902 and the fourth pipe 903 all penetrate through the second connector 901, the third pipe 902 and the fourth pipe 903 are parallel, two ends of the third pipe 902 and the fourth pipe 903 are both open, one end of each of the plurality of second connectors 901 (four second connectors 901) is connected to one end of the remaining cold plates 300 (four cold plates 300), and the third pipe 902 is communicated with the first flow channel 301, and the fourth pipe 903 is communicated with the second flow channel 302, as shown in fig. 4, the first pipe 701 includes a plurality of first branch pipes 7011 (five first branch pipes 7011), the second pipe 702 includes a plurality of second branch pipes 7021 (five second branch pipes 7021), the plurality of first branch pipes 7011 are respectively connected between the two water inlet holes and the plurality of third pipes 902, and the plurality of second branch pipes 7021 are respectively connected between the two water outlet holes and the plurality of fourth pipes 903.

Here, the water inlet may be provided on a first sub-pipe 7011 connected between the water inlet hole of one of the first connectors 800 and the third pipe 902, the water outlet may be provided on a second sub-pipe 7021 connected between the water outlet hole of the other of the first connectors 800 and the fourth pipe 903, and the battery pack may further include a water inlet pipe 401 and a water outlet pipe 402, the water inlet pipe 401 being communicated with the water inlet, the water outlet pipe 402 being communicated with the water outlet.

In addition, as shown in fig. 5, the battery pack may further include a plurality of adapter plates 600 (four adapter plates 600) corresponding to the plurality of second connectors 901 one to one, the bottom end of the adapter plate 600 is connected to the base plate 100, and the side portion of the adapter plate 600 is connected to the other end of the second connectors 901, where the water nozzle and the adapter plate 600 respectively and the cold plate 300 are integrally welded by a laser welding process, and the adapter plate 600 (forged component) reduces thermal deformation input and welding deformation, improves welding strength, and further may effectively support each water pipe and the plurality of cold plates 300.

In addition, as shown in fig. 6, the first flow channel 301 may include two first sub-flow channels 3011, the second flow channel 302 may include two second sub-flow channels 3021, and the two second flow channels 302 may be respectively communicated with the two second sub-flow channels 3021, so that the liquid distribution may be more uniform due to the arrangement of the double flow channels, and the heat dissipation efficiency may be improved.

According to the battery package of this application, the battery package includes the bottom plate, two support bodies and a plurality of cold drawing, wherein, two cold plates in a plurality of cold drawing respectively with two support body integrated into one piece, all the other cold plates in a plurality of cold plates respectively with the at least partial integrated into one piece of bottom plate, two support bodies set up respectively in the both sides of bottom plate, all cold drawing of this application all with support body or bottom plate integrated into one piece, for the connected mode of current cold plate, not only structural strength is high, the cycle life of battery package has been improved, and then the security performance of battery package has been improved, and need not extra connecting spare part, the volume production product uniformity also improves greatly.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present application and are intended to be covered by the appended claims. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A battery pack is characterized by comprising a bottom plate, two frame bodies and a plurality of cold plates,

two cold plates of the plurality of cold plates are respectively and integrally formed with the two frame bodies,

the remaining cold plates of the plurality of cold plates are each integrally formed with at least a portion of the base plate,

the two frame bodies are respectively arranged on two sides of the bottom plate.

2. The battery pack of claim 1, wherein the plurality of cold plates are arranged in parallel, the plurality of cold plates are perpendicular to the base plate, and a battery module is disposed between any two adjacent cold plates.

3. The battery pack according to claim 1, wherein the holder body includes a support portion and a base, the base is disposed at a bottom of the support portion in a use state of the battery pack, the cold plate is disposed at a side portion of the support portion, the base is coupled to an upper surface of the base plate, and the cold plate is formed as a rectangular plate.

4. The battery pack of claim 1, further comprising a first conduit and a second conduit, the interior of each of the plurality of cold plates having a first flow passage and a second flow passage disposed therein, the first flow passage and the second flow passage of each of the plurality of cold plates being in communication,

each first flow passage is communicated with the first pipeline, each second flow passage is communicated with the second pipeline,

the first pipeline is provided with a water inlet, and the second pipeline is provided with a water outlet.

5. The battery pack of claim 4, further comprising two first connectors and a plurality of water nozzles,

the two cold plates arranged on the two frame bodies correspond to the two first connecting pieces respectively, and one end of each of the two cold plates arranged on the two frame bodies is connected with the corresponding first connecting piece;

the inner sides of the two first connecting pieces are respectively provided with a water inlet and a water outlet, the water inlet is communicated with the first flow channel, the water outlet is communicated with the second flow channel,

each of the plurality of water nozzles comprises a third pipeline, a fourth pipeline and a second connecting piece, the third pipeline and the fourth pipeline penetrate through the second connecting piece, the third pipeline and the fourth pipeline are parallel, two ends of the third pipeline and two ends of the fourth pipeline are both arranged in an open mode,

the number of the rest cold plates is equal to that of the water nozzles and corresponds to that of the water nozzles one to one, one end of each cold plate in the rest cold plates is connected to one end of the second connecting piece of the corresponding water nozzle and communicated with the third pipeline and the first flow passage and the fourth pipeline and the second flow passage,

the first pipeline comprises a plurality of first branch pipelines, the second pipeline comprises a plurality of second branch pipelines, the first branch pipelines are connected with two water inlets and a plurality of third pipelines respectively, and the second branch pipelines are connected with two water outlets and a plurality of fourth pipelines respectively.

6. The battery pack according to claim 5, further comprising a water inlet pipe, a water outlet pipe, and a plurality of adapter plates corresponding to the plurality of water nozzles one to one, wherein the water inlet pipe is communicated with the water inlet, the water outlet pipe is communicated with the water outlet,

the bottom end of the adapter plate is connected to the bottom plate, and the side portion of the adapter plate is connected to the other end of the second connecting piece.

7. The battery pack according to claim 1,

the base plate includes a plurality of segments connected in series, each of the plurality of segments being integrally formed with at least one of the cold plates, a first of the plurality of segments and a last of the plurality of segments being connected to the two shelves, respectively.

8. The battery pack according to claim 2, further comprising a heat insulating layer, wherein the heat insulating layer is disposed between the bottom plate and the battery module and outside the frame body.

9. The battery pack of claim 2, further comprising a thermally conductive layer disposed between the inner sides of any two adjacent cold plates and the two sides of the battery module.

10. The battery pack according to any one of claims 1 to 9,

two of the cold plates of the plurality of cold plates are each provided integrally with the two frame bodies via profile extrusion,

and the rest cold plates in the plurality of cold plates are respectively and integrally formed with at least part of the base plate through profile extrusion.

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