CN111864311A

CN111864311A - Battery pack and cold plate thereof

Info

Publication number: CN111864311A
Application number: CN202010900101.XA
Authority: CN
Inventors: 蒋碧文
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-10-30

Abstract

The invention discloses a battery pack and a cold plate thereof. In the invention, a main inlet channel for cooling medium to flow in, a main outlet channel for cooling medium to flow out and a plurality of cooling modules for communicating the main inlet channel and the main outlet channel are arranged on a cold plate, and the cooling modules are sequentially arranged and connected in parallel; each cooling module has a plurality of cooling sub-modules connected in series, each cooling sub-module having a fluid passage therein. Compared with the prior art, the battery pack can stably and uniformly dissipate heat, is safer to use and has a prolonged service life.

Description

Battery pack and cold plate thereof

Technical Field

The invention relates to the field of batteries, in particular to a battery pack and a cold plate thereof.

Background

The battery pack includes a bottom plate, a plurality of battery modules placed on the bottom plate, an outer frame surrounding the battery modules, and a top plate. The battery module is fixed on the bottom plate, and the frame is fixed mutually with the bottom plate, and roof and bottom plate set up relatively, and the roof is together fixed with the frame. A plurality of electric cores have been placed again in the battery module, and in the battery package work, electric core meeting long-term generating heat, and the electric core heat adjacent with each side of battery package can have the part to scatter in the battery module, but the heat that is located central area electricity core is difficult to scatter, and the battery package is in the work under the high temperature for a long time, will influence the life of battery package, and has the potential safety hazard. In addition, when the battery pack is placed in an automobile for use, peripheral parts of the automobile can be affected due to overhigh temperature of the battery pack, the automobile can be operated in a high-temperature environment all the time, the safety is poor, and the service lives of other parts of the automobile are also affected.

Disclosure of Invention

The invention aims to provide a battery pack and a cold plate thereof, so that the battery pack can stably and uniformly dissipate heat, the battery pack is safer to use, and the service life of the battery pack is prolonged.

In order to solve the technical problem, an embodiment of the present invention provides a cold plate of a battery pack, wherein a total inlet channel for a cooling medium to flow in, a total outlet channel for a cooling medium to flow out, and a plurality of cooling modules communicating the total inlet channel and the total outlet channel are formed on the cold plate of the battery pack, and the cooling modules are sequentially arranged and connected in parallel;

each cooling module has a plurality of cooling sub-modules connected in series therein, each cooling sub-module having a fluid passage therein.

The embodiment of the invention also provides a battery pack, which comprises the cold plate and a battery module arranged on the cold plate, wherein the battery module is provided with a plurality of battery cores.

Compared with the prior art, the cooling plate is provided with the main inlet channel, the main outlet channel and the plurality of cooling modules, the cooling modules are connected in parallel, the cooling medium enters the main inlet channel, is shunted in the main inlet channel and enters the cooling modules, and flows in the cooling modules to dissipate heat of the battery modules corresponding to the cooling modules. Each cooling module is also provided with a plurality of cooling sub-modules which are connected in series, each cooling sub-module is provided with a fluid channel, and cooling media in each cooling module circulate in the fluid channels of the cooling sub-modules and flow out of the cooling modules, so that the cooling media flow through each area in each cooling module, and the battery modules corresponding to each cooling module can be better cooled. And then realize letting the electric core heat dissipation in the battery module, and the heat dissipation is even, improves the life-span of battery package, and it is also safer to use. When the battery pack is used in an automobile, peripheral parts of the battery pack cannot be influenced by the battery pack, and the automobile has a safe operation environment.

In one embodiment, each of the cooling sub-modules has a plurality of parallel fluid passages therein.

In one embodiment, the cooling modules are sequentially arranged along a preset direction; the main inlet channel and the main outlet channel extend along the arrangement direction of the cooling modules and are positioned at two sides of the cooling modules;

each cooling module is provided with a module inlet communicated with the main inlet channel and a module outlet communicated with the main outlet channel; wherein the inlets of the modules are positioned on the same side and arranged along the extending direction of the total access passage; wherein the module outlets are located on the same side and arranged along the extending direction of the main outlet channel.

In one embodiment, the fluid passages in each cooling submodule are arranged in sequence along the preset direction; each cooling submodule is provided with a sub-inlet channel communicated with the inlet of the fluid channel in the cooling submodule and a sub-outlet channel communicated with the outlet of the fluid channel in the cooling submodule; the sub-inlet channel and the sub-outlet channel in each cooling submodule are respectively arranged on two sides of the fluid channel in the cooling submodule;

the sub-inlet channel of one cooling sub-module in each cooling module is communicated with the module inlet, and the sub-outlet channel of the other cooling sub-module in each cooling module is communicated with the module outlet.

In one embodiment, the sub-outlet channel of one of the two adjacent cooling sub-modules connected in series and the sub-inlet channel of the other cooling sub-module are located on the same side and are communicated with each other.

In one embodiment, the number of cooling submodules in each cooling module is odd.

In one embodiment, the number of the cooling sub-modules in each cooling module is three, and the three cooling sub-modules are sequentially connected and respectively comprise an initial sub-module, a middle sub-module and a terminal sub-module; the sub-inlet channel of the initial sub-module is communicated with the module inlet, and the sub-outlet channel of the terminal sub-module is communicated with the module outlet; the sub-outlet channel of the initial sub-module is communicated with the sub-inlet channel of the middle sub-module, and the sub-outlet channel of the middle sub-module is communicated with the sub-inlet channel of the terminal sub-module.

In one embodiment, the fluid passages are arranged in parallel.

In one embodiment, the tube diameter of the total access channel gradually increases in the direction of flow of the cooling medium therein.

Drawings

Fig. 1 is a schematic view illustrating a structure in which a battery module is placed on a cold plate according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the internal structure of a cold plate illustrating a cooling submodule in an embodiment of the present invention;

FIG. 3 is a schematic diagram of the internal structure of a cold plate illustrating fluid passages in an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solutions claimed in the claims of the present application can be implemented without these technical details and with various changes and modifications based on the following embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings in order to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

Embodiments of the present invention are described below with reference to the drawings. As shown in fig. 1 and 2, the battery pack includes: the cold plate 7, arrange the battery module 8 that sets up on the cold plate 7, have a plurality of electric cores in the battery module 8. As shown in fig. 2, a main inlet channel 4 for the inflow of the cooling medium, a main outlet channel 5 for the outflow of the cooling medium, and a plurality of cooling modules communicating the main inlet channel 4 and the main outlet channel 5 are disposed on the cold plate 7, and the cooling modules are connected in parallel. Each cooling module has a plurality of cooling sub-modules connected in series, each cooling sub-module having a fluid passage therein. The cold plate 7 comprises an upper plate and a lower plate, a total inlet channel 4, a total outlet channel 5 and a cooling module are formed between the upper plate and the lower plate, and a cooling medium enters the total inlet channel 4 from the space between the upper plate and the lower plate and then flows out from the space between the upper plate and the lower plate.

Specifically, as shown in fig. 2 and 3, three cooling modules are disposed on the cold plate 7, which are respectively a cooling module 1, a cooling module 2, and a cooling module 3 sequentially arranged, the cooling module 1 has a module inlet 10 communicating with the main inlet and a module outlet 100 communicating with the main outlet 5, the cooling module 2 has a module inlet 20 communicating with the main inlet and a module outlet 200 communicating with the main outlet 5, the cooling module 3 has a module inlet 30 communicating with the main inlet and a module outlet 300 communicating with the main outlet 5, the module inlet 10, the module inlet 20, and the module inlet 30 are disposed on the same side and arranged along the extending direction of the main inlet 4, and the module outlet 100, the module outlet 200, and the module outlet 300 are disposed on the same side and arranged along the extending direction of the main outlet 5. That is, each cooling module has a module inlet communicating with the main inlet and a module outlet communicating with the main outlet passage 5, the module inlets are located on the same side and arranged along the extending direction of the main inlet passage 4, and the module outlets are located on the same side and arranged along the extending direction of the main outlet passage 5.

In addition, as shown in fig. 2 and 3, three cooling submodules connected in series are provided in each of the cooling module 1, the cooling module 2, and the cooling module 3. Taking the cooling module 1 as an example, the cooling module 1 has a cooling sub-module 11, a cooling sub-module 12, and a cooling sub-module 13, the cooling sub-module 11, the cooling sub-module 12, and the cooling sub-module 13 all have fluid passages therein, a plurality of or one fluid passage in each cooling sub-module may be provided, and when a plurality of fluid passages in each cooling sub-module are provided, the fluid passages may be connected in parallel or in series.

According to the above, since the cold plate 7 is provided with the main inlet channel 4, the main outlet channel 5 and the plurality of cooling modules, and the cooling modules are connected in parallel, the cooling medium enters the main inlet channel 4, is shunted in the main inlet channel 4 and enters the cooling modules, and flows in the cooling modules to dissipate heat of the battery modules 8 corresponding to the cooling modules. Each cooling module is also provided with a plurality of cooling sub-modules which are connected in series, each cooling sub-module is provided with a fluid channel, and cooling media in each cooling module circulate in the fluid channels of the cooling sub-modules and flow out of the cooling modules, so that the cooling media flow through each area in each cooling module, and the battery modules 8 corresponding to each cooling module can be better cooled. And then realize letting the electric core heat dissipation in the battery module 8, and the heat dissipation is even, improves the life-span of battery package, and it is also safer to use. When the battery pack is used in an automobile, peripheral parts of the battery pack cannot be influenced by the battery pack, and the automobile has a safe operation environment.

Further, each cooling submodule has a plurality of parallel fluid channels therein. As shown in fig. 2 and fig. 3, the structural layout of each cooling module is the same, taking the cooling module 1 as an example, the cooling submodule 11 has a fluid channel 111, a fluid channel 112, a fluid channel 113 and a fluid channel 114 connected in parallel, the cooling submodule 12 has a fluid channel 121, a fluid channel 122, a fluid channel 123 and a fluid channel 124 connected in parallel, and the cooling submodule 13 has a fluid channel 131, a fluid channel 132, a fluid channel 133 and a fluid channel 134 connected in parallel, and each fluid channel is arranged in sequence along a preset direction, as shown in the direction of arrow a in the figure. The cooling submodule 11 has a sub-inlet channel 115 and a sub-outlet channel 116, the sub-inlet channel 115 communicates with inlets of the fluid channel 111, the fluid channel 112, the fluid channel 113 and the fluid channel 114, the sub-outlet channel 116 communicates with outlets of the fluid channel 111, the fluid channel 112, the fluid channel 113 and the fluid channel 114, and the sub-inlet channel 115 and the sub-outlet channel 116 are respectively located at two sides of the fluid channel 111, the fluid channel 112, the fluid channel 113 and the fluid channel 114. The sub-inlet channel 115 is connected to the module inlet 10, and the sub-outlet channel 136 is connected to the module outlet 100. The cooling sub-module 12 and the cooling sub-module 13 have the same structure as the cooling sub-module 11, the cooling sub-module 12 has a sub-inlet channel 125 and a sub-outlet channel 126, and the cooling sub-module 13 has a sub-inlet channel 135 and a sub-outlet channel 136, which will not be described in detail herein.

In addition, the number of the cooling sub-modules in each cooling module is odd, so that the module inlets and the module outlets in the cooling modules are positioned on two sides and are respectively and directly connected to the main inlet channel 4 and the main outlet channel 5, the layout design of each channel is convenient, and the structure is simple.

Further, the cooling sub-module 11 may be an initial sub-module, the cooling sub-module 12 may be an intermediate sub-module, the cooling sub-module 13 may be an end sub-module, the module inlet 10 may be located at the cooling sub-module 11, and the module outlet 100 may be located at the cooling sub-module 13. In order to allow the cooling medium flowing out of the

fluid passages

111, 112, 113 and 114 of the cooling submodule 11 to flow into the cooling submodule 12 smoothly, the sub outlet passage 116 is communicated with the sub inlet passage 125 and is located on the same side. Similarly, the sub outlet channel 136 is connected to the sub inlet channel 135 and located on the same side for the cooling medium in the cooling sub-module 12 to flow into the cooling sub-module 13 smoothly. That is, the sub-outlet channel of one cooling sub-module and the sub-inlet channel of the other cooling sub-module of two adjacent and serially connected cooling sub-modules are located on the same side and are communicated with each other.

Specifically, as shown by arrows B in fig. 2 and 3, the cooling medium may be water or coolant, which flows from the main inlet channel 4, through the module inlet 10, into the sub-inlet channel 115, from the sub-inlet channel 115, into the

fluid channels

111, 112, 113, and 114, flows out of the

fluid channels

111, 112, 113, and 114, into the sub-outlet channel 116, through the sub-outlet channel 116, into the sub-inlet channel 125, flows from the sub-inlet channel 125, into the

fluid channels

121, 122, 123, and 124, flows out of the

fluid channels

121, 122, 123, and 124, into the sub-outlet channel 126, from the sub-outlet channel 126, into the sub-inlet channel 135, flows from the sub-inlet channel 135, into the

fluid channels

131, 132, 133, and 134, flows from fluid channel 131, fluid channel 132, fluid channel 133, and fluid channel 134 into sub-outlet channel 136, and finally flows out from module outlet 100 to main outlet channel 5 and out from main outlet channel 5. In the same manner as the flow paths described above, the cooling medium in the inlet manifold channel 4 enters the cooling submodule 2 through the module inlet 20, enters the cooling module 3 through the module inlet 30, and flows out of the module outlet 200 and the module outlet 300 into the outlet manifold channel 5. It is understood that the module inlet 10 may communicate with the sub-inlet channel 125 of the cooling sub-module 12, and the module outlet 100 may communicate with the sub-outlet channel 136 of the cooling sub-module 13, which is not limited herein. Likewise, the module inlet 20 and the module outlet 200 may also communicate with different cooling submodules in the cooling module 2. The module inlet 30 and the module outlet 300 may also communicate with different cooling sub-modules in the cooling module 3.

Optionally, the fluid channels are all arranged in parallel, so that the fluid channels in the cold plate are arranged more regularly, and the cooling medium flows more orderly. The pipe diameter of the main inlet passage 4 gradually increases along the flowing direction of the cooling medium therein, that is, the pipe diameter of the main inlet passage 4 gradually increases from the cooling module 1 to the cooling module 2, so that after the cooling medium enters the cooling module 1 and the cooling module 2, the residual cooling medium can rapidly enter the cooling module 3.

It will be appreciated that the number of cooling modules may be 2, 4 or 5 etc., and that the number of cooling sub-modules in each cooling module may also be 2, 4 or 5 etc. The connection key between the cooling module and the cooling submodule is the same regardless of the number, and the details are not further described here.

Another embodiment of the present invention further relates to a battery pack: the battery module comprises the cold plate 7 and the battery module 8 arranged on the cold plate 7, wherein the battery module 8 is provided with a plurality of battery cores.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

Claims

1. The cold plate of the battery pack is characterized in that a main inlet channel for cooling medium to flow in, a main outlet channel for cooling medium to flow out and a plurality of cooling modules for communicating the main inlet channel and the main outlet channel are arranged on the cold plate of the battery pack, and the cooling modules are sequentially arranged and connected in parallel;

2. The cold plate of the battery pack of claim 1, wherein each of the cooling sub-modules has a plurality of fluid passages therein in parallel.

3. The cold plate of the battery pack of claim 2, wherein the cooling modules are arranged in series along a predetermined direction; the main inlet channel and the main outlet channel extend along the arrangement direction of the cooling modules and are positioned at two sides of the cooling modules;

4. The cold plate of the battery pack of claim 3, wherein the fluid passages in each of the cooling sub-modules are arranged in series along the predetermined direction; each cooling submodule is provided with a sub-inlet channel communicated with the inlet of the fluid channel in the cooling submodule and a sub-outlet channel communicated with the outlet of the fluid channel in the cooling submodule; the sub-inlet channel and the sub-outlet channel in each cooling submodule are respectively arranged on two sides of the fluid channel in the cooling submodule;

5. The cold plate of the battery pack of claim 4, wherein the sub-exit channel of one of the cooling sub-modules and the sub-entry channel of the other of the two adjacent and serially connected cooling sub-modules are located on the same side and are in communication.

6. The cold plate of a battery pack according to claim 1, wherein the number of cooling sub-modules in each cooling module is an odd number.

7. The cold plate of the battery pack of claim 5, wherein the number of the cooling sub-modules in each of the cooling modules is three, and the three cooling sub-modules are connected in series and are an initial sub-module, a middle sub-module, and an end sub-module, respectively; the sub-inlet channel of the initial sub-module is communicated with the module inlet, and the sub-outlet channel of the terminal sub-module is communicated with the module outlet; the sub-outlet channel of the initial sub-module is communicated with the sub-inlet channel of the middle sub-module, and the sub-outlet channel of the middle sub-module is communicated with the sub-inlet channel of the terminal sub-module.

8. The cold plate of the battery pack of claim 2, wherein the fluid channels are arranged in parallel.

9. The cold plate of the battery pack of claim 1, wherein the tube diameter of the total access passage gradually increases in a direction of flow of the cooling medium therein.

10. A battery pack, characterized by a cold plate according to any one of claims 1 to 9, a battery module arranged on the cold plate, and a plurality of battery cells in the battery module.