CN219959219U - Battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack which comprises a box body and a battery, wherein the thickness of the shell of the battery is smaller than or equal to 3.8mm, a heat exchange plate is arranged at the bottom of the box body, the battery is borne on the heat exchange plate, the heat exchange plate is used for exchanging heat with the battery, structural adhesive is filled between the battery and the heat exchange plate, and the heat exchange plate is a section member. Through the structural design, the heat exchange plate adopts the profile component, and compared with the existing heat exchange plate formed by stamping, brazing and the like, the heat exchange plate has higher structural strength, so that the deformation of the heat exchange plate under the vibration working condition is relieved or avoided, the stress is transmitted to the battery, the battery with the shell adopting the thin structural design is ensured not to fail, and the electrical property of the battery pack is optimized.

Description

Battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack.

Background

In the case of the prior art battery pack design, the batteries that are not grouped are arranged directly in the housing in order to increase the energy density of the battery pack. Because the existing part of the battery adopts a thin design with the thickness of the shell being less than 3.8mm, when the battery pack is impacted under the vibration working condition, the existing heat exchange plate formed by stamping, brazing and the like is weak, deformation is easy to generate due to the impact, deformation stress is easy to be transferred to the battery, the shell of the battery is invalid, and the electrical property of the battery pack is influenced.

Disclosure of Invention

It is therefore a primary object of the present utility model to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a battery pack having a heat exchange plate with a high structural strength that is capable of avoiding battery failure due to impact.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

according to one aspect of the utility model, a battery pack is provided, wherein the battery pack comprises a box body and a battery, the thickness of the shell of the battery is less than or equal to 3.8mm, a heat exchange plate is arranged at the bottom of the box body, the battery is loaded on the heat exchange plate, the heat exchange plate is used for exchanging heat with the battery, structural adhesive is filled between the battery and the heat exchange plate, and the heat exchange plate is a profile member.

According to the technical scheme, the battery pack provided by the utility model has the advantages and positive effects that:

the battery pack comprises a box body and a battery, wherein the thickness of the shell of the battery is less than or equal to 3.8mm, a heat exchange plate is arranged at the bottom of the box body, the battery is borne on the heat exchange plate, the heat exchange plate is used for exchanging heat with the battery, structural adhesive is filled between the battery and the heat exchange plate, and the heat exchange plate is a section bar member. Through the structural design, the heat exchange plate adopts the profile component, and compared with the existing heat exchange plate formed by stamping, brazing and the like, the heat exchange plate has higher structural strength, so that the deformation of the heat exchange plate under the vibration working condition is relieved or avoided, the stress is transmitted to the battery, the battery with the shell adopting the thin structural design is ensured not to fail, and the electrical property of the battery pack is optimized.

Drawings

Various objects, features and advantages of the present utility model will become more apparent from the following detailed description of the preferred embodiments of the utility model, when taken in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the utility model and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout. Wherein:

fig. 1 is a schematic perspective view of a battery pack according to an exemplary embodiment;

fig. 2 is a schematic perspective view of a battery of the battery pack shown in fig. 1;

fig. 3 is a schematic perspective view of a case of the battery pack shown in fig. 1;

fig. 4 is a schematic perspective view of the heat exchange plate shown in fig. 3;

fig. 5 is a schematic plan view of the heat exchanger plate shown in fig. 3;

fig. 6 is a schematic plan view of a heat exchange plate of a battery pack according to another exemplary embodiment;

fig. 7 is a schematic perspective view of a case of a battery pack according to still another exemplary embodiment;

fig. 8 is a schematic perspective view of the heat exchange plate shown in fig. 7;

fig. 9 is a schematic plan view of the heat exchange plate shown in fig. 7.

The reference numerals are explained as follows:

100. a case;

110. a heat exchange plate;

111. a first component;

112. a second component;

113. a third component;

114. a fourth component;

115. a fifth component;

116. a pipeline;

200. a battery;

r corner;

x, a first direction;

y. second direction.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model are described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and drawings are intended to be illustrative in nature and not to be limiting.

In the following description of various exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the utility model may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present utility model. Moreover, although the terms "over," "between," "within," and the like may be used in this description to describe various exemplary features and elements of the utility model, these terms are used herein for convenience only, e.g., in terms of the orientation of the examples depicted in the drawings. Nothing in this specification should be construed as requiring a particular three-dimensional orientation of the structure in order to fall within the scope of the utility model.

Referring to fig. 1, a schematic perspective view of a battery pack according to the present utility model is representatively illustrated. In this exemplary embodiment, the battery pack according to the present utility model is described by taking an in-vehicle battery as an example. Those skilled in the art will readily appreciate that many modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to adapt the relevant designs of the present utility model to other types of battery devices, and such changes remain within the principles of the battery packs presented herein.

As shown in fig. 1, in an embodiment of the present utility model, a battery pack according to the present utility model includes a case 100 and a battery 200. Referring to fig. 2-5 in conjunction, a schematic perspective view of a battery 200 is representatively illustrated in fig. 2; a schematic perspective view of the case 100 is representatively illustrated in fig. 3; a schematic perspective view of the heat exchange plate 110 is representatively illustrated in fig. 4; fig. 5 shows a schematic plan view of a heat exchanger plate 110, in which the flow paths of the heat exchange medium in the flow-guiding section, the main body section and the junction section of the heat exchange flow channel are shown in each case in the form of three arrow leads. The structure, connection manner and functional relationship of the main components of the battery pack according to the present utility model will be described in detail with reference to the above drawings.

As shown in fig. 1 to 4, in an embodiment of the present utility model, the thickness of the housing of the battery 200 is less than or equal to 3.8mm, that is, the housing of the battery 200 is designed in a slim type structure. On this basis, the bottom of the box 100 is provided with a heat exchange plate 110, the battery 200 is supported on the heat exchange plate 110, the heat exchange plate 110 is used for exchanging heat with the battery 200, structural adhesive is filled between the battery 200 and the heat exchange plate 110, and the heat exchange plate 110 is a section member. Through the structural design, the heat exchange plate 110 is made of the sectional material members, and compared with the existing heat exchange plate 110 formed by stamping, brazing and the like, the heat exchange plate 110 has higher structural strength, so that deformation of the heat exchange plate 110 under a vibration working condition is relieved or avoided, stress is transmitted to the battery 200, the battery 200 with a shell adopting a thin structural design is ensured not to fail, and the electrical performance of a battery pack is optimized.

For example, the battery pack proposed by the present utility model may take the form of a group of "CIR (Cell in Room)". Since the structural adhesive is filled between the battery 200 and the heat exchange plate 110, the strength requirement of the battery pack on the heat exchange plate 110 is high, wherein the reasons include: the batteries 200 in the battery pack in the "CIR" group form must be fixed in the battery pack by structural adhesive, that is, the batteries 200 and the heat exchange plates 110 are fixed by the filled structural adhesive therebetween, and accordingly, when the bottom of the battery pack is impacted to deform the heat exchange plates 110, the impact force is transmitted to the batteries 200 through the heat exchange plates 110 and the structural adhesive, and the batteries 200 are directly extruded. In some embodiments, the battery pack according to the present utility model may also be in other groups, which only needs to be filled with the structural adhesive between the battery 200 and the heat exchange plate 100.

As shown in fig. 2, in an embodiment of the present utility model, the case has an R-corner 210, and the thickness of the R-corner 210 is smaller than that of the rest of the case, thereby making the R-corner 210 a weak portion of the case. Accordingly, when thermal runaway of the battery 200 occurs, the weak portion of the case is melted prior to the rest of the case, so that high-temperature gas is ejected through the weak portion. Through the structural design, the utility model does not need to arrange an independent explosion-proof structure on the shell, thereby saving the process flow of the battery 200 shell. In addition, when the case of the battery 200 is designed with the weak portion, the structural strength of the R-corner 210 of the battery 200 is low due to the molding method, and when the strength of the heat exchange plate 110 at the lower portion of the battery 200 is also low, stress is transmitted to the R-corner 210 of the battery 200, and the valve opening of the battery 200 may occur under normal conditions other than thermal runaway. In this regard, the present utility model can satisfy the design requirements of the battery 200 of the above-described special weak portion design by using the heat exchange plate 110 having higher structural strength. In some embodiments, the material melting point of the R corner 210 of the battery 200 case is lower than the material melting point of the rest of the case, so that the R corner structure may be a weak portion of the case, and of course, when the thickness of the R corner 210 is smaller than the thickness of the rest of the case, the material melting point of the R corner 210 may be lower than the material melting point of the rest of the case.

As shown in fig. 3 to 5, in an embodiment of the present utility model, the heat exchange plate 110 may include a plurality of profile assemblies having sub-runners which communicate to collectively form the heat exchange runner of the heat exchange plate 110. Through the structural design, the heat exchange plate 110 with larger size can be divided into a plurality of profile components with smaller size, so that the moment of the dispersed structure can be shortened, the structural strength is improved, and the problem that bending deformation is easy to occur in the middle area when the single structure of the heat exchange plate 110 is oversized is avoided.

Based on the structural design that the heat exchange plate 110 includes a plurality of profile components, in an embodiment of the present utility model, a heat exchange flow channel of the heat exchange plate 110 may include a drainage section, a main body section and a confluence section, and a flowing direction of a heat exchange medium in the heat exchange flow channel sequentially flows through the drainage section, the main body section and the confluence section. On the basis of this, the sub-flow channels of each profile component can participate in the formation of at least one of the drainage section, the main section and the confluence section. For convenience of understanding and explanation, the flow paths of the heat exchange medium in the drainage section, the main body section and the confluence section of the heat exchange flow channel are respectively shown in three forms of arrow leads in fig. 5 and 6, specifically, straight arrows in the drawings indicate the flow paths of the heat exchange medium in the main body section, dot-line arrows indicate the flow paths of the heat exchange medium in the drainage section, and dotted arrows indicate the flow paths of the heat exchange medium in the confluence section.

As shown in fig. 4 and 5, in an embodiment of the present utility model, the plurality of profile assemblies may include two first assemblies 111 aligned along a first direction X, and each first assembly 111 is provided with second assemblies 112 along both sides of a second direction Y, which is perpendicular to the first direction X, respectively. On the basis of this, the sub-flow passages of the first module 111 constitute a main body section, the sub-flow passages of the second module 112 located on one side in the second direction Y constitute a drainage section, and the sub-flow passages of the second module 112 located on the other side in the second direction Y constitute a confluence section.

As shown in fig. 4 and 5, based on the structural design that the plurality of profile assemblies includes the first assembly 111 and the second assembly 112, in an embodiment of the present utility model, the plurality of profile assemblies may further include a third assembly 113, the third assembly 113 is disposed on one side of one first assembly 111 facing away from the other first assembly 111, two ends of the sub-flow channels of the third assembly 113 along the second direction Y are respectively connected to the sub-flow channels of the two second assemblies 112, the sub-flow channels of the third assembly 113 respectively participate in forming the drainage section and the confluence section, that is, the third assembly 113 has two sub-flow channels separated from each other, one part of the sub-flow channels participate in forming the drainage section and are communicated with the sub-flow channels of the second assembly 112 on one side, and the other part of the sub-flow channels participate in forming the confluence section and are communicated with the sub-flow channels of the second assembly 112 on the other side.

As shown in fig. 4 and 5, based on the structural design that the plurality of profile components includes the third component 113, in an embodiment of the present utility model, the plurality of profile components may further include a fourth component 114, where the fourth component 114 is disposed on a side of the third component 113 facing away from the first component 111, the fourth component 114 is provided with a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the drainage section and the confluence section of the third component 113 through the sub-flow channels of the fourth component 114. Accordingly, for the heat exchange plate 110 formed by a plurality of profile components, the fourth component 114 may be used as a connection portion of the heat exchange plate 110 and connected to a water inlet and outlet port or a water inlet and outlet pipe, so as to allow circulation of the heat exchange medium.

As shown in fig. 4 and 5, based on the structural design that the plurality of profile assemblies includes the first assembly 111, the second assembly 112 and the third assembly 113, in an embodiment of the present utility model, the plurality of profile assemblies may further include a fifth assembly 115, the fifth assembly 115 is disposed on a side of the first assembly 111 opposite to the other first assembly 111 where the third assembly 113 is not disposed, and the fifth assembly 115 may not be provided with a sub-flow channel, that is, the fifth assembly 115 may be capable of blocking sub-flow channels of two adjacent second assemblies 112.

Referring to fig. 6, a schematic plan view of a heat exchange plate 110 of a battery pack capable of embodying the principles of the present utility model in another exemplary embodiment is representatively illustrated in fig. 6, wherein flow paths of heat exchange medium in the drainage section, main body section and confluence section of the heat exchange flow channel are shown in particular in three forms of arrow leads, respectively.

As shown in fig. 6, in an embodiment of the present utility model, the plurality of profile assemblies includes two first assemblies 111 aligned along the first direction X, and each first assembly 111 is provided with a second assembly 112 at both sides along the second direction Y, respectively. On this basis, a part of the sub-flow passages of the first component 111 constitute a main body section, another part of the sub-flow passages of the first component 111 constitute a confluence section, and the sub-flow passages of the second component 112 constitute a drainage section. Through the structural design, the length of the main body section is shorter, so that the stability and uniformity of the heat exchange plate 110 are further improved, and the heat exchange effect of the battery pack is improved.

As shown in fig. 6, based on the structural design that the plurality of profile components include the first component 111 and the second component 112, in an embodiment of the present utility model, the plurality of profile components may further include a third component 113, where the third component 113 is disposed on a side of one first component 111 facing away from the other first component 111, and two ends of the sub-flow channels of the third component 113 along the second direction Y are respectively connected to the sub-flow channels of the two second components 112, and the sub-flow channels of the third component 113 respectively participate in forming the drainage section and the confluence section.

As shown in fig. 6, based on the structural design that the plurality of profile components includes the third component 113, in an embodiment of the present utility model, the plurality of profile components may further include a fourth component 114, where the fourth component 114 is disposed on a side of the third component 113 facing away from the first component 111, and the fourth component 114 is provided with a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the drainage section and the confluence section of the third component 113 through a sub-runner of the fourth component 114. Accordingly, for the heat exchange plate 110 formed by a plurality of profile components, the fourth component 114 may be used as a connection portion of the heat exchange plate 110 and connected to a water inlet and outlet port or a water inlet and outlet pipe, so as to allow circulation of the heat exchange medium.

As shown in fig. 6, based on the structural design of the plurality of profile assemblies including the first assembly 111, the second assembly 112 and the third assembly 113, in an embodiment of the present utility model, the plurality of profile assemblies may further include a fifth assembly 115, where the fifth assembly 115 is disposed on a side of the first assembly 111, which is opposite to the other first assembly 111, where the third assembly 113 is not disposed, and the fifth assembly 115 may not be disposed with a sub-flow channel, that is, the fifth assembly 115 may be capable of blocking sub-flow channels of two adjacent second assemblies 112.

As shown in fig. 4 and 5 or fig. 6, based on the structural design that the heat exchange plate 110 includes a plurality of profile components, in some embodiments of the present utility model, at least two profile components may be formed into the heat exchange plate 110 by adopting a splice welding manner, and sub-flow channels of at least two profile components are directly communicated. For example, a profile assembly employing splice welded connections and sub-runners in direct communication includes: between the two first components 111, between the first component 111 and the second component 112 provided on the side of itself, between the third component 113 and one first component 111 and the two second components 112, between the fourth component 114 and the third component 113, and between the fifth component 115 and the other first component 111 and the other two second components 112.

Referring to fig. 7 to 9, a schematic perspective view of a case 100 of a battery pack in another exemplary embodiment capable of embodying the principles of the present utility model is representatively illustrated in fig. 7; fig. 8 representatively illustrates a schematic perspective view of the heat exchange plate 110 illustrated in fig. 7; fig. 9 representatively shows a schematic plan view of the heat exchange plate 110 shown in fig. 7.

Still taking as an example a structural design in which the heat exchanger plate 110 comprises a plurality of profile assemblies, as shown in fig. 7 to 9, in an embodiment of the present utility model at least two profile assemblies are arranged at intervals, the sub-flow channels of the at least two profile assemblies are in communication via a pipe 116. For example, two adjacent profile assemblies arranged at intervals comprise: two first assemblies 111, two second assemblies 112 located on the same side along the second direction Y. The two profile assemblies in which the sub-runners communicate via the pipe 116 include: two second components 112 located on the same side in the second direction Y.

It should be noted herein that the battery packs shown in the drawings and described in this specification are only a few examples of the wide variety of battery packs that can employ the principles of the present utility model. It should be clearly understood that the principles of the present utility model are in no way limited to any details or any components of the battery pack shown in the drawings or described in the present specification.

In summary, the battery pack provided by the utility model includes the case 100 and the battery 200, the thickness of the case of the battery 200 is less than or equal to 3.8mm, the bottom of the case 100 is provided with the heat exchange plate 110, the battery 200 is carried on the heat exchange plate 110, the heat exchange plate 110 is used for exchanging heat with the battery 200, structural adhesive is filled between the battery 200 and the heat exchange plate 110, and the heat exchange plate 110 is a section member. Through the structural design, the heat exchange plate 110 is made of the sectional material members, and compared with the existing heat exchange plate 110 formed by stamping, brazing and the like, the heat exchange plate 110 has higher structural strength, so that deformation of the heat exchange plate 110 under a vibration working condition is relieved or avoided, stress is transmitted to the battery 200, the battery 200 with a shell adopting a thin structural design is ensured not to fail, and the electrical performance of a battery pack is optimized.

Exemplary embodiments of the battery pack according to the present utility model are described and/or illustrated in detail above. Embodiments of the utility model are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or each step of one embodiment may also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. that are described and/or illustrated herein, the terms "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc., in addition to the listed elements/components/etc. Furthermore, the terms "first" and "second" and the like in the claims and in the description are used for descriptive purposes only and not for numerical limitation of their subject matter.

While the utility model has been described in terms of various specific embodiments, those skilled in the art will recognize that the utility model can be practiced with modification within the spirit and scope of the claims.

Claims (10)

1. The battery pack is characterized by comprising a box body and a battery, wherein the thickness of the shell of the battery is smaller than or equal to 3.8mm, a heat exchange plate is arranged at the bottom of the box body, the battery is loaded on the heat exchange plate, the heat exchange plate is used for exchanging heat with the battery, structural adhesive is filled between the battery and the heat exchange plate, and the heat exchange plate is a section member.

2. The battery pack of claim 1, wherein the case has an R-corner portion having a thickness smaller than a thickness of a remaining portion of the case, and/or a material melting point of the R-corner portion is lower than a material melting point of the remaining portion of the case, such that the R-corner portion becomes a weak portion.

3. The battery pack of claim 1, wherein the heat exchange plate comprises a plurality of profile assemblies having sub-runners, the sub-runners of the plurality of profile assemblies being in communication to collectively form the heat exchange runner of the heat exchange plate.

4. The battery pack according to claim 3, wherein the heat exchange flow passage comprises a drainage section, a main body section and a confluence section, and the circulation direction of the heat exchange medium in the heat exchange flow passage is that the heat exchange medium flows through the drainage section, the main body section and the confluence section in sequence; wherein the sub-runner of each profile assembly participates in forming at least one of the drainage section, the main body section and the confluence section.

5. The battery pack according to claim 4, wherein the plurality of profile members includes two first members arranged in a first direction, each of the first members being provided with second members on both sides in a second direction, the second direction being perpendicular to the first direction; the sub-flow passage of the first component forms the main body section, the sub-flow passage of the second component positioned at one side along the second direction forms the drainage section, and the sub-flow passage of the second component positioned at the other side along the second direction forms the confluence section.

6. The battery pack according to claim 5, wherein the plurality of profile components further comprises a third component, the third component is disposed on a side of one of the first components facing away from the other of the first components, two ends of the sub-flow channels of the third component along the second direction are respectively connected to the two sub-flow channels of the second components, and the sub-flow channels of the third component respectively participate in forming the drainage section and the confluence section.

7. The battery pack according to claim 4, wherein the plurality of profile members includes two first members arranged in a first direction, each of the first members being provided with second members on both sides in a second direction, the second direction being perpendicular to the first direction; the main body section is formed by a part of sub-flow passages of the first component, the confluence section is formed by the other part of sub-flow passages of the first component, and the drainage section is formed by the sub-flow passages of the second component.

8. The battery pack according to claim 7, wherein the plurality of profile components further comprises a third component, the third component is disposed on a side of one of the first components facing away from the other of the first components, two ends of the sub-flow channels of the third component along the second direction are respectively connected to the two sub-flow channels of the second components, and the sub-flow channels of the third component respectively participate in forming the drainage section and the confluence section.

9. The battery pack according to claim 6 or 8, wherein the plurality of profile components further comprises a fourth component, the fourth component is disposed on a side of the third component facing away from the first component, the fourth component is provided with a water inlet and a water outlet, and the water inlet and the water outlet are communicated with the drainage section and the confluence section of the third component through a sub-runner of the fourth component.

10. A battery pack according to claim 3, wherein:

at least two section bar components are spliced and welded to form the heat exchange plate, and the sub-runners of the at least two section bar components are directly communicated; and/or

At least two section bar components are arranged at intervals, and the sub-runners of the at least two section bar components are communicated through a pipeline.