WO2022041428A1

WO2022041428A1 - Battery pack and cold plate therefor

Info

Publication number: WO2022041428A1
Application number: PCT/CN2020/123157
Authority: WO
Inventors: 蒋碧文; 何亚飞; 赵卫军
Original assignee: 远景动力技术(江苏)有限公司; 远景睿泰动力技术(上海)有限公司
Priority date: 2020-08-31
Filing date: 2020-10-23
Publication date: 2022-03-03

Abstract

A battery pack and a cold plate (7) therefor. The cold plate (7) is provided with a main intake channel (4) for a cooling medium to flow therein, a main output channel (5) for the cooling medium to flow thereout, and a plurality of cooling modules, which communicate the main intake channel (4) with the main output channel (5), wherein the cooling modules are sequentially arranged and connected in parallel, each cooling module is provided with a plurality of cooling sub-modules connected in series, and each cooling sub-module is provided with a fluid channel. Compared with the prior art, the battery pack can stably and uniformly dissipate heat, is safer to use, and the service life thereof is prolonged.

Description

Battery pack and its cold plate

Cross-reference to related applications

This patent application claims the priority of the following two Chinese patent applications: the application date is August 31, 2020, the application number is 2020109000943, the invention name is "battery pack and its cold plate", and the application date is August 2020 On the 31st, the Chinese patent application with the application number of 202010900101X and the invention name of "battery pack and its cold plate", the full text of the above application is incorporated herein by reference.

technical field

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

Background technique

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, the outer frame is fixed with the bottom plate, the top plate and the bottom plate are arranged oppositely, and the top plate and the outer frame are fixed together. There are multiple cells in the battery module. During the operation of the battery pack, the cells will generate heat for a long time. The heat of the cells adjacent to each side of the battery pack in the battery module may be partially dissipated, but the heat is located in the center. The heat of the battery cells in the area is difficult to dissipate, and the battery pack works at high temperature for a long time, which will affect the service life of the battery pack and pose a safety hazard. In addition, when the battery pack is used in a car, the high temperature of the battery pack will affect the surrounding parts of the car, keeping the car running in a high temperature environment, poor safety, and affecting the life of other parts of the car.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a battery pack and a cold plate thereof, so that the battery pack can dissipate heat evenly and be used more safely and reliably.

In order to solve the above technical problems, embodiments of the present invention provide a cold plate for a battery pack,

The cold plate of the battery pack, the cold plate of the battery pack is provided with a general inlet channel for cooling medium inflow, a general outlet channel for cooling medium outflow, and a plurality of channels connecting the general inlet channel and the general outlet channel cooling modules, and the cooling modules are arranged in sequence and connected in parallel;

Each of the cooling modules has a plurality of cooling sub-modules connected in series, and each of the cooling sub-modules has a fluid channel therein.

An embodiment of the present invention also provides a battery pack, including the above-mentioned cold plate, and a battery module arranged on the cold plate, wherein the battery module has a plurality of battery cells.

Compared with the prior art, in the embodiment of the present invention, since the cold plate is provided with a general inlet channel, a general outlet channel and a plurality of cooling modules, and the cooling modules are connected in parallel, the cooling medium enters the general inlet channel, and the cooling medium enters the general inlet channel. The inlet channel is divided into each cooling module, and the cooling medium flows in each cooling module to dissipate heat to the battery module corresponding to the cooling module. Each cooling module has a plurality of cooling sub-modules connected in series, each cooling sub-module has a fluid channel, and the cooling medium in each cooling module circulates in the fluid channel of the cooling sub-module, and then flows out from the cooling module, so that each cooling Each area in the module has a cooling medium flowing through, so that the battery module corresponding to each cooling module can be better dissipated. In this way, the cells in the battery module can be dissipated, and the heat dissipation is uniform, thereby improving the life of the battery pack and making it safer to use. When the battery pack is used in the car, the surrounding parts of the battery pack will not be affected by the battery pack, so that the car has a safe operating environment.

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

In one embodiment, the cooling modules are arranged in sequence along a preset direction; and the total inlet channel and the total outlet channel both extend along the arrangement direction of the cooling modules, and are located in each cooling module. both sides of the module;

Each of the cooling modules has a module inlet communicated with the general inlet channel and a module outlet communicated with the general outlet channel; wherein each of the module inlets is located on the same side and extends along the general inlet channel direction arrangement; wherein each of the module outlets is located on the same side, and is arranged along the extension direction of the total outlet channel.

In one embodiment, the fluid channels in each of the cooling sub-modules are arranged in sequence along the preset direction; each of the cooling sub-modules has a sub-inlet that communicates with the inlet of the fluid channel in the cooling sub-module. a sub-outlet channel, and a sub-outlet channel communicated with the outlet of the fluid channel in the cooling sub-module; and the sub-inlet channel and sub-outlet channel in each of the cooling sub-modules are respectively provided in the cooling sub-module of the fluid channel in the cooling sub-module. both sides;

In each of the cooling modules, a sub-inlet channel of one of the cooling sub-modules communicates with the module inlet, and a sub-outlet channel of the other cooling sub-module in each of the cooling modules communicates with the module outlet.

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

In one embodiment, the number of cooling sub-modules in each of the cooling modules is an odd number.

In one embodiment, there are three cooling sub-modules in each of the cooling modules, and the three cooling sub-modules are connected in sequence and are respectively an initial sub-module, an intermediate sub-module and an end sub-module; The sub-entry channel of the initial sub-module is communicated with the module inlet, 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 middle sub-module. The sub-inlet channels are communicated with each other, and the sub-outlet channels of the middle sub-module are communicated with the sub-inlet channels of the end sub-module.

In one embodiment, at least part of the inlet of the fluid channel is provided with a protruding piece.

Each of the cooling modules has a module inlet communicated with the general inlet channel and a module outlet communicated with the general outlet channel; wherein each of the module inlets is located on the same side and along the extension direction of the general inlet channel Arrangement; wherein each of the module outlets is located on the same side, and is arranged along the extension direction of the total outlet channel.

In one embodiment, each of the cooling sub-modules has a sub-inlet channel communicated with the inlet of the fluid channel in the cooling sub-module, and a sub-outlet channel communicated with the outlet of the fluid channel in the cooling sub-module and the sub-inlet channel and sub-outlet channel in each cooling sub-module are respectively arranged on both sides of the fluid channel in the cooling sub-module;

A sub-inlet channel of one cooling sub-module in each of the cooling modules is communicated with the module inlet, and a sub-outlet channel of the other cooling sub-module in each of the cooling modules is communicated with the module outlet;

The protruding piece corresponding to each of the fluid passages is arranged in the sub-inlet passage of the cooling sub-module where the fluid passage is located, and the protruding piece is arranged opposite to the inlet of the fluid passage.

In one embodiment, the protruding parts are spaced apart from the side walls of the sub-access channel where the protruding parts are located.

In one embodiment, each of the fluid channels includes a first side wall and a second side wall, and the first side wall and the second side wall are separated from each other to form a cavity through which the cooling medium passes;

The first side wall includes a first head end and a first tail end opposite to the first head end, and the second side wall includes a second head end and a first end opposite to the second head end. Two tail ends; the first head end and the second head end are spaced apart from each other to form the inlet of the fluid channel, and the first end end and the second tail end are spaced apart from each other to form the inlet of the fluid channel Export;

The width of the protruding piece corresponding to each fluid channel is smaller than the distance from the first head end to the second head end in the fluid channel.

In one embodiment, the inlet of the module is provided with a diverting protrusion, and the diverting protrusion is located in the sub-inlet channel communicated with the inlet of the module.

In one embodiment, the diverting protruding position is a circular truncated truncated cone, and is spaced apart from the protruding piece in the inlet channel where it is located.

In one embodiment, the protruding member is a circular frustum.

In one embodiment, an inlet protrusion is provided at the entrance of the general inlet channel, and the inlet protrusion is separated from the side wall of the general inlet channel.

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

In one embodiment, the pipe diameter of the total inlet channel gradually increases along the flow direction of the cooling medium therein. An embodiment of the present invention also provides a battery pack, including the above-mentioned cold plate, and a battery module arranged on the cold plate, wherein the battery module has a plurality of battery cells.

Description of drawings

1 is a schematic structural diagram of a battery module 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 without protruding parts in an embodiment of the present invention, and a cooling sub-module is marked;

3 is a schematic diagram of the internal structure of a cold plate without a protruding member in an embodiment of the present invention, with fluid passages marked;

4 is a schematic diagram of the internal structure of a cold plate with a protruding piece according to an embodiment of the present invention, and a cooling sub-module is marked;

5 is a schematic diagram of the internal structure of a cold plate with a protruding piece according to an embodiment of the present invention, with fluid passages marked;

6 is a schematic structural diagram of a cooling module in an embodiment of the present invention;

7 is a schematic structural diagram of a cooling sub-module in a cooling module according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of the internal structure of a cold plate with an inlet protrusion according to an embodiment of the present invention.

detailed description

In order to make the objectives, technical solutions and advantages of the present invention clearer, each embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can appreciate that, in the various embodiments of the present invention, many technical details are set forth in order for the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the claims of the present application can be realized.

Unless the context requires otherwise, throughout the specification and claims, the word "comprising" and variations thereof, such as "comprising" and "having", should be construed in an open, inclusive sense, i.e., should be interpreted as "including, but not limited to".

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to more clearly understand the objects, features and advantages of the present invention. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solutions 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 "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures or characteristics may be combined in any manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a" 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 content clearly dictates otherwise.

In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but "front", "rear", "left", "right", "outer", "inner" should be "," "outward", "inward", "up", "down" and other words are to be understood as convenient terms, and should not be understood as limiting words.

Embodiments of the present invention are described below with reference to the accompanying drawings. As shown in FIG. 1 and FIG. 2 , the battery pack includes: a cold plate 7 , and a battery module 8 arranged on the cold plate 7 , and the battery module 8 has a plurality of cells. As shown in FIG. 2 , the cold plate 7 is provided with a general inlet channel 4 for the inflow of the cooling medium, a general outlet channel 5 for the outflow of the cooling medium, and a plurality of cooling modules connecting the general inlet channel 4 and the general outlet channel 5 , 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 has a fluid channel, and at least part of the inlet of the fluid channel is provided with a protruding piece. The cold plate 7 includes an upper plate and a lower plate, and a general inlet channel 4, a general outlet channel 5 and a cooling module are formed between the upper plate and the lower plate, and the cooling medium enters the general inlet channel 4 from between the upper plate and the lower plate, Then flow out between the upper and lower plates.

Specifically, as shown in FIG. 2 and FIG. 3 , the cold plate 7 is provided with three cooling modules, namely cooling module 1 , cooling module 2 and cooling module 3 arranged in sequence. The module inlet 10 and the module outlet 100 communicated with the general outlet channel 5, the cooling module 2 has a module inlet 20 communicated with the general inlet channel and the module outlet 200 communicated with the general outlet channel 5, and the cooling module 3 has a module communicated with the general inlet channel. The module outlet 300 where the inlet 30 communicates with the general outlet channel 5, the module inlet 10, the module inlet 20 and the module inlet 30 are on the same side, and are arranged along the extension direction of the general inlet channel 4, the module outlet 100, the module outlet 200 and the module outlet 300 are on the same side and are arranged along the extending direction of the general outlet channel 5 . That is to say, each cooling module has a module inlet that communicates with the general inlet channel 4 and a module outlet that communicates with the general outlet channel 5. Each module inlet is located on the same side and is arranged along the extension direction of the general inlet channel 4. The outlets of each module are located on the same side and are arranged along the extension direction of the general outlet channel 5 .

In addition, as shown in FIG. 2 and FIG. 3 , the cooling module 1 , the cooling module 2 and the cooling module 3 are all provided with three cooling sub-modules connected in series. 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, and the cooling sub-module 11, the cooling sub-module 12 and the cooling sub-module 13 all have fluid channels, and each cooling sub-module The number of fluid channels in the module may be multiple or one, and when there are multiple fluid channels in each cooling sub-module, they may be connected in parallel or in series.

It can be seen from the above content that since the cold plate 7 is provided with a general inlet channel 4, a general outlet channel 5 and a plurality of cooling modules, and each cooling module is connected in parallel, the cooling medium enters the general inlet channel 4, and in the general inlet channel 4 is divided into each cooling module, and the cooling medium flows in each cooling module to dissipate heat to the battery module 8 corresponding to the cooling module. Each cooling module has a plurality of cooling sub-modules connected in series, and each cooling sub-module has a fluid channel, and the cooling medium in each cooling module circulates in the fluid channel of the cooling sub-module, and then flows out from the cooling module, so that each cooling medium flows out. Each area in the module has a cooling medium flowing through, so that the battery module 8 corresponding to each cooling module can be better dissipated. In this way, the cells in the battery module 8 can be dissipated evenly, thereby improving the life of the battery pack and making it safer to use. When the battery pack is used in the car, the surrounding parts of the battery pack will not be affected by the battery pack, so that the car has a safe operating environment.

Further, each cooling sub-module has a plurality of parallel fluid channels. As shown in FIG. 2 and FIG. 3 , the structural layout of each cooling module is the same. Taking cooling module 1 as an example, the cooling sub-module 11 has parallel fluid channels 111 , fluid channels 112 , fluid channels 113 and fluid channels 114 . The cooling sub-module 12 has a parallel fluid channel 121, a fluid channel 122, a fluid channel 123 and a fluid channel 124, and the cooling sub-module 13 has a parallel fluid channel 131, a fluid channel 132, a fluid channel 133 and a fluid channel 134. Each fluid The channels are arranged in sequence along the preset direction, as shown in the direction of arrow A in the figure. The cooling sub-module 11 has a sub-inlet channel 115 and a sub-outlet channel 116, the sub-inlet channel 115 is connected with the inlets of the fluid channel 111, the fluid channel 112, the fluid channel 113 and the fluid channel 114, and the sub-outlet channel 116 is connected with the fluid channel 111 , the fluid channel 112 , the fluid channel 113 and the outlet of the fluid channel 114 are connected, and the sub-inlet channel 115 and the sub-outlet channel 116 are located on both sides of the fluid channel 111 , the fluid channel 112 , the fluid channel 113 and the fluid channel 114 respectively. The sub-inlet channel 115 communicates with the module inlet 10 , and the sub-outlet channel 136 communicates with 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. The cooling sub-module 13 has a sub-inlet channel 135 and a sub-outlet channel 136. This will not be described in detail. It can be understood that the module inlet 10 is also communicated with the sub-inlet channel 125 of the cooling sub-module 12, and the module outlet 100 is communicated with the sub-outlet channel 136 of the cooling sub-module 13, which is not specifically limited here. Likewise, module inlet 20 and module outlet 200 may also communicate with different cooling sub-modules in cooling module 2 . Module inlet 30 and module outlet 300 may also communicate with different cooling sub-modules in cooling module 3 .

In addition, the number of cooling sub-modules in each cooling module is an odd number, so that the module inlet and module outlet in the cooling module are located on both sides, and are directly connected to the total inlet channel 4 and the total outlet channel 5 respectively, which facilitates the layout of each channel. Design, simple structure.

Further, the cooling sub-module 11 may be an initial sub-module, the cooling sub-module 12 is an intermediate sub-module, the cooling sub-module 13 is an end sub-module, the module inlet 10 is located at the cooling sub-module 11, and the module outlet 100 is located at the cooling sub-module 13. .

In order to allow the cooling medium flowing out of the fluid channel 111 , the fluid channel 112 , the fluid channel 113 and the fluid channel 114 of the cooling sub-module 11 to flow into the cooling sub-module 12 smoothly, the sub-outlet channel 116 communicates with the sub-inlet channel 125 and on the same side. Likewise, in order for the cooling medium in the cooling sub-module 12 to flow into the cooling sub-module 13 smoothly, the sub-outlet channel 136 communicates with the sub-inlet channel 135 and is located on the same side. That is to say, the sub-outlet channel of one cooling sub-module and the sub-inlet channel of the other cooling sub-module are located on the same side and communicate with each other in two adjacent cooling sub-modules in series.

Specifically, as shown in FIG. 2 and FIG. 3 , the arrow B is the flow direction of the cooling medium, and the cooling medium can be water or coolant flowing from the main inlet channel 4 through the module inlet 10 into the sub-inlet channel 115 , The sub-inlet channel 115 enters the fluid channel 111, the fluid channel 112, the fluid channel 113 and the fluid channel 114, flows out from the fluid channel 111, the fluid channel 112, the fluid channel 113 and the fluid channel 114 into the sub-outlet channel 116, and then flows out to the sub-outlet channel 116. Enter the sub-inlet channel 125 through the sub-outlet channel 116, flow into the fluid channel 121, the fluid channel 122, the fluid channel 123 and the fluid channel 124 from the sub-inlet channel 125, and flow from the fluid channel 121, the fluid channel 122, the fluid channel 123 and the fluid The channel 124 flows out into the sub-outlet channel 126, from the sub-outlet channel 126 into the sub-inlet channel 135, from the sub-inlet channel 135 into the fluid channel 131, the fluid channel 132, the fluid channel 133 and the fluid channel 134, from the fluid channel 131 , the fluid channel 132 , the fluid channel 133 and the fluid channel 134 flow into the sub-outlet channel 136 , and finally flow out from the module outlet 100 to the main outlet channel 5 , and flow out from the main outlet channel 5 . In the same way as above, the cooling medium in the general inlet channel 4 enters the cooling module 2 through the module inlet 20 , enters the cooling module 3 through the module inlet 30 , and flows out from the module outlet 200 and the module outlet 300 into the general outlet channel 5 . It can be understood that the module inlet 10 is also communicated with the sub-inlet channel 125 of the cooling sub-module 12, and the module outlet 100 is communicated with the sub-outlet channel 136 of the cooling sub-module 13, which is not specifically limited here. Likewise, module inlet 20 and module outlet 200 may also communicate with different cooling sub-modules in cooling module 2 . Module inlet 30 and module outlet 300 may also communicate with different cooling sub-modules in cooling module 3 . Therefore, after the cooling medium enters each cooling sub-module, it can be divided into multiple flow channels at the same time, allowing the cooling medium to flow through multiple areas in the cold plate at the same time, so that the battery modules corresponding to the cold plate can better dissipate heat.

Optionally, each fluid channel is arranged in parallel, so that the arrangement of the fluid channels in the cold plate is more regular, and the circulation of the cooling medium is more orderly. The pipe diameter of the general inlet channel 4 gradually increases along the flow direction of the cooling medium in it, that is, the pipe diameter of the general inlet channel 4 gradually increases from the cooling module 1 to the cooling module 2, allowing the cooling medium to enter the cooling module 1. After cooling the module 2, the remaining cooling medium can quickly enter the cooling module 3.

It can be understood that the number of cooling modules may be 2, 4 or 5 etc., and the number of cooling sub-modules in each cooling module may also be 2, 4 or 5 etc. Regardless of the number of cooling modules and cooling sub-modules, the connection relationship between them is the same as above, and will not be described in detail here.

Further, when one fluid channel is provided in the cooling sub-module, there may be no protruding part at the inlet of the fluid channel. However, when there are multiple fluid channels in the cooling sub-module, as shown in FIG. 3 , protruding parts may be provided at the inlets of some of the fluid channels, and of course, protruding parts may be provided at the inlets of all the fluid channels. Since the cold plate 7 is provided with a general inlet channel 4, a general outlet channel 5 and a plurality of cooling modules, and each cooling module is connected in parallel, the cooling medium enters the general inlet channel 4, and is divided into each cooling module in the general inlet channel 4. , the cooling medium flows in each cooling module to dissipate heat to the battery module 8 corresponding to the cooling module. Each cooling module has a plurality of cooling sub-modules connected in series, each cooling sub-module has a fluid channel, a protruding piece is arranged at the inlet of the fluid channel, and the cooling medium in each cooling module is protruded when passing through the protruding piece The parts are divided so that the cooling medium can flow into each fluid channel evenly. The cooling medium flows out from the cooling modules, so that an appropriate amount of cooling medium flows through each area of each cooling module, so that the battery modules corresponding to each cooling module can be better dissipated. In this way, the heat dissipation of the battery pack is evenly realized, the life of the battery pack is improved, and the use is also safer.

In addition, the protruding piece corresponding to each fluid channel is arranged in the sub-inlet channel of the cooling sub-module where the fluid channel is located, and the protruding piece is arranged opposite to the inlet of the fluid channel. Specifically, as shown in FIG. 5 and FIG. 6 , the arrow B is the flow direction of the cooling medium. Taking the cooling module 1 as an example, the sub-inlet channel 115 is provided with a protruding piece 91 and a protruding piece 92 , and the protruding piece is 91 is arranged opposite to the inlet of the fluid channel 112 , and the protruding piece 92 is arranged opposite to the inlet of the fluid channel 113 . And the protruding piece 91 and the protruding piece 92 are spaced apart from the side wall of the sub-inlet channel 115 , so that when the cooling medium flows in the sub-inlet channel 115 , the branched part by the protruding piece 91 flows downward into the fluid channel 111 . The other part flows upward, and the protruding piece 92 divides the cooling medium flowing upward again. The side surface of the protruding piece 92 forms a guide surface to allow the cooling medium to flow into the fluid channel 112 , the fluid channel 113 and the fluid channel 114 more uniformly. The sub-inlet channel 125 is provided with a protruding piece 93 , a protruding piece 94 and a protruding piece 95 , and the protruding piece 93 , the protruding piece 94 and the protruding piece 95 are all separated from the side wall of the sub-inlet channel 125 , the protruding piece 93 is arranged opposite to the inlet of the fluid channel 121 , the projecting piece 94 is arranged opposite to the inlet of the fluid channel 122 , and the projecting piece 95 is arranged opposite to the inlet of the fluid channel 123 . The protruding piece 93 divides the cooling medium in the sub-entry channel 125 into the fluid passage 121, the protruding piece 94 flows the dividing part of the cooling medium into the fluid passage 122, and the protruding piece 95 flows the dividing part of the cooling medium into the fluid passage 122. into the fluid channel 123 , and the rest of the cooling medium flows into the fluid channel 124 . A protruding piece 96 , a protruding piece 97 and a protruding piece 98 are provided in the sub-intake channel 135 , and the protruding piece 96 , the protruding piece 97 and the protruding piece 98 are spaced apart from the side wall of the sub-inlet channel 135 . The protruding piece 96 is arranged opposite to the inlet of the fluid channel 131 , the projecting piece 97 is arranged opposite to the inlet of the fluid channel 132 , and the projecting piece 98 is arranged opposite to the inlet of the fluid channel 133 . The protruding piece 96 divides the cooling medium in the sub-entry channel 135 into the fluid passage 131, the protruding piece 97 flows the dividing part of the cooling medium into the fluid passage 132, and the protruding piece 98 flows the dividing part of the cooling medium into the fluid passage 132. into the fluid channel 133 , and the rest of the cooling medium flows into the fluid channel 134 . When each fluid channel in the cooling module 2 and the cooling module 3 needs to be provided with corresponding protruding parts, it is the same as the protruding parts in the cooling module 1, and will not be described in detail here. Through the arrangement of the protruding parts, the cooling medium entering each fluid channel from the sub-inlet channel can enter each fluid channel uniformly, so that the cooling medium is evenly circulated throughout the cold plate, and the heat dissipation effect of the battery module is better.

In addition, the structure of each fluid channel is the same, as shown in FIG. 5 , FIG. 6 and FIG. 7 , taking the fluid channel 133 as an example, the fluid channel 133 includes a first side wall 1331 and a second side wall 1332 , the first side wall 1331 and the The second side walls 1332 are spaced apart from each other to form a cavity through which the cooling medium passes. The first side wall 1331 includes a first head end 13311 and a first tail end 13312 opposite to the first head end 13311 , and the second side wall 1332 includes a second head end 13321 and a second head end 13321 opposite to the second head end 13321 The tail end 13322 , the first head end 13311 and the second head end 13321 are spaced apart from each other to form the inlet of the fluid passage 133 , and the first tail end 13312 and the second tail end 13322 are spaced apart from each other to form the outlet of the fluid passage 133 . The width of the protruding piece 98 is smaller than the distance from the first head end 13311 to the second head end 13321 . The same can be said for the widths of the corresponding protrusions of the remaining fluid channels.

Optionally, the protruding piece is a circular truncated cone, also a cylinder, or a polygonal prism, and the protruding piece can be integrally formed with the lower plate of the cold plate. The sides of the truncated truncated surface are partially inclined towards the flow channel in the cooling sub-module where the truncated truncated surface is located. Taking the protruding member 98 as an example, the side surface of the protruding member 98 is inclined to the fluid channel 133 , and the side surface of the protruding member 98 is also partially inclined to the fluid channel 132 . Thereby, the cooling medium is guided to the fluid channel 122 and the fluid channel 133 .

What is more worth mentioning is that the inlet of the module is provided with a diverting protrusion, and the diverting protrusion is located in the sub-inlet channel communicated with the inlet of the module. The diverter protrusion is also spaced from the protrusion in the access channel in which it is located. Specifically, as shown in FIG. 5 and FIG. 6 , the module inlet 10 is provided with a diverting protrusion 61 , and the diverting protrusion 61 is in the sub-inlet channel 115 and is spaced apart from the protruding piece 91 and the protruding piece 92 , After entering from the module inlet 10 , the cooling medium is firstly split through the split protrusion 61 , and then split through the protruding piece 91 and the protruding piece 92 . Likewise, the module inlet 20 is provided with a diverter protrusion 62 . Allow the cooling medium to flow into each fluid channel more evenly.

In addition, each branching protrusion can be a circular truncated cone, a cylinder, or a polygonal prism.

It can be understood that the diverting protrusions can also be arranged in the cold plate without the protrusions.

Further, as shown in FIG. 8 , an inlet protrusion 40 is provided at the entrance of the general inlet channel 4 , and the inlet protrusion 40 is separated from the side wall of the general inlet channel 4 . The inlet protrusion 40 can be a circular truncated cone, a cylinder, or a polygonal prism. The cooling medium entering the general inlet channel 4 is first divided into two parts by the inlet protrusion, one part directly enters the cooling module 1, and the other part goes to the cooling module. 2 and cooling module 3 flow.

It will be appreciated that the inlet protrusions 40 may also be provided in cold plates without protrusions.

Another embodiment of the present invention also relates to a battery pack comprising the above-mentioned cold plate 7 and a battery module 8 arranged on the cold plate 7, wherein the battery module 8 has a plurality of cells.

The preferred embodiments of the present invention have been described in detail above, but it is to be understood that aspects of the embodiments can be modified, if desired, to employ aspects, features and concepts of various patents, applications and publications to provide additional 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 as limiting to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments, along with all equivalents to which these claims are entitled Scope.

Claims

A cold plate for a battery pack, characterized in that the cold plate of the battery pack is provided with a general inlet channel for the inflow of cooling medium, a general outlet channel for the outflow of the cooling medium, and a general inlet channel for connecting the general inlet channel and the a plurality of cooling modules of the general outlet channel, and the cooling modules are arranged in sequence and connected in parallel;

Each of the cooling modules has a plurality of cooling sub-modules connected in series, and each of the cooling sub-modules has a fluid channel therein.
The cold plate of the battery pack according to claim 1, wherein each of the cooling sub-modules has a plurality of parallel fluid channels.
The cold plate of a battery pack according to claim 2, wherein each of the cooling modules is arranged in sequence along a preset direction; and the total inlet channel and the total outlet channel are along each of the cooling modules extending in the arrangement direction and located on both sides of each cooling module;

Each of the cooling modules has a module inlet communicated with the general inlet channel and a module outlet communicated with the general outlet channel; wherein each of the module inlets is located on the same side and extends along the general inlet channel direction arrangement; wherein each of the module outlets is located on the same side, and is arranged along the extension direction of the total outlet channel.
The cold plate of a battery pack according to claim 3, wherein the fluid channels in each of the cooling sub-modules are arranged in sequence along the preset direction; A sub-inlet channel communicated with the inlet of the fluid channel in the cooling sub-module, and a sub-outlet channel communicated with the outlet of the fluid channel in the cooling sub-module; and the sub-inlet channel and sub-outlet channel in each cooling sub-module are respectively provided on both sides of the fluid channel in the cooling sub-module;

In each of the cooling modules, a sub-inlet channel of one of the cooling sub-modules communicates with the module inlet, and a sub-outlet channel of the other cooling sub-module in each of the cooling modules communicates with the module outlet.
The cold plate of a battery pack according to claim 4, wherein a sub-outlet channel of one of the cooling sub-modules and a sub-outlet channel of the other cooling sub-module of the two adjacent and series-connected cooling sub-modules The sub-access channels are on the same side and connected.
The cold plate of a battery pack according to claim 1, wherein the number of cooling sub-modules in each of the cooling modules is an odd number.
The cold plate of a battery pack according to claim 6, wherein there are three cooling sub-modules in each of the cooling modules, and the three cooling sub-modules are connected in sequence and are respectively initial sub-modules , the middle submodule and the end submodule; wherein the sub-entry channel of the initial submodule is communicated with the module inlet, and the sub-outlet channel of the end submodule is communicated with the module outlet; the initial submodule The sub-outlet channel of the middle sub-module communicates with the sub-inlet channel of the middle sub-module, and the sub-outlet channel of the middle sub-module communicates with the sub-inlet channel of the end sub-module.
The cold plate of a battery pack according to claim 2, wherein at least part of the inlet of the fluid channel is provided with a protruding piece.
The cold plate of a battery pack according to claim 8, wherein each of the cooling modules is arranged in sequence along a preset direction; and the total inlet channel and the total outlet channel are along each of the cooling modules extending in the arrangement direction and located on both sides of each cooling module;

Each of the cooling modules has a module inlet communicated with the general inlet channel and a module outlet communicated with the general outlet channel; wherein each of the module inlets is located on the same side and along the extension direction of the general inlet channel Arrangement; wherein each of the module outlets is located on the same side, and is arranged along the extension direction of the total outlet channel.
The cold plate of a battery pack according to claim 9, wherein each of the cooling sub-modules has a sub-inlet channel that communicates with the inlet of the fluid channel in the cooling sub-module, and has a sub-inlet channel connected to the cooling sub-module. and the sub-outlet channel and the sub-outlet channel in each cooling sub-module are respectively arranged on both sides of the fluid channel in the cooling sub-module;

A sub-inlet channel of one cooling sub-module in each of the cooling modules is communicated with the module inlet, and a sub-outlet channel of the other cooling sub-module in each of the cooling modules is communicated with the module outlet;

The protruding piece corresponding to each of the fluid passages is arranged in the sub-inlet passage of the cooling sub-module where the fluid passage is located, and the protruding piece is arranged opposite to the inlet of the fluid passage.
The cold plate of a battery pack according to claim 10, wherein the protruding member and the side wall of the sub-inlet channel where the protruding member is located are separated from each other.
The cold plate of the battery pack according to claim 11, wherein each of the fluid channels comprises a first side wall and a second side wall, and the first side wall and the second side wall are formed to be separated from each other. a cavity through which the cooling medium passes;

The first side wall includes a first head end and a first tail end opposite to the first head end, and the second side wall includes a second head end and a first end opposite to the second head end. Two tail ends; the first head end and the second head end are spaced apart from each other to form the inlet of the fluid channel, and the first end end and the second tail end are spaced apart from each other to form the inlet of the fluid channel Export;

The width of the protruding piece corresponding to each fluid channel is smaller than the distance from the first head end to the second head end in the fluid channel.
The cold plate of the battery pack according to claim 3 or 10, characterized in that, the inlet of the module is provided with a shunt protrusion, and the shunt protrusion is located in the sub-inlet channel communicated with the inlet of the module.
The cold plate of a battery pack according to claim 13, wherein the diverting protrusion is a circular truncated position and is spaced apart from the protrusion in the inlet channel where it is located.
The cold plate for a battery pack according to claim 8, wherein the protruding member is a circular truncated plate.
The cold plate of the battery pack according to any one of claims 1-15, wherein an inlet protrusion is provided at the entrance of the general inlet channel, and the inlet protrusion is connected to the general inlet channel. The side walls of the channels are spaced apart.
The cold plate of the battery pack according to any one of claims 1-16, wherein each of the fluid channels is arranged in parallel.
The cold plate for a battery pack according to any one of claims 1-17, wherein the pipe diameter of the total inlet channel gradually increases along the flow direction of the cooling medium therein.
A battery pack, characterized in that the cold plate according to any one of claims 1-18, and the battery modules arranged on the cold plate, wherein the battery module has a plurality of battery cells.